Properties of subatomic particles Protons Electrons Neutrons

Slides:



Advertisements
Similar presentations
Section 4–2: The Structure of an Atom
Advertisements

The Structure of the Atom
The Structure of an Atom
 Element – building block of matter  Atom – smallest unit of an element that contains all the properties of that element  117 known elements = 117.
The Structure of an Atom. Beams like the ones Thomson produced create the images on many television screens. When a beam sweeps across the screen, spots.
4.2 The Structure of an Atom This 45-foot-tall steel sculpture is made of 10 tons of steel. If a proton had the same mass as the sculpture, then an electron.
Glencoe: Chapter 19 Section 1 “part 1” Pages
Structure of an Atom 4.2 Objectives Identify 3 subatomic particles and compare their properties Distinguish the atomic number of an element from the.
Atomic Mass & Number Isotopes The Periodic Table.
The Structure of the Atom
The Periodic Table. Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus.
Subatomic Particles and Isotopes. Subatomic Particles Protons- Positively Charged Protons- Positively Charged Located in the nucleus Located in the nucleus.
DO NOW: Answer the following questions 1. What are the subatomic particles? 2. Where are each subatomic particle located? 3. What is the charge associated.
Chapter 4 - Part 2 Protons, neutrons and electrons are all subatomic particles. Protons are positive (+) charged particles found in the nucleus of an atom.
4.2 The Structure of an Atom. Atom is the smallest particle of an element. Atoms cannot be divided into anything smaller.
Physical Science Chapter 4.
Explaining the Periodic Table (6.7) If elements are the building blocks of all other matter, what are they made of? There are three particles that make.
Atomic Structure. Inside an Atom Over time, scientists have come up with many theories about the inside of atoms. Today we believe that an atom has a.
4.2 The Structure of an Atom NEW - Opener #1 TUES (8th grade standard) - Hint: see ch. 4.2 & 4.1 if needed What is an atom? 2. What are.
9/18/ The Structure of an Atom THE STRUCTURE OF AN ATOM  VOCABULARY:  proton  electron  neutron  OBJECTIVES:  Identify three subatomic.
Building Blocks 1c Int
How Atoms Differ.
The Atom Chapter 4.2. Atoms: Are the smallest unit of an element that maintains the properties of that element. All atoms have a diameter of
This 45-foot-tall steel sculpture is made of 10 tons of steel
Chp 4.2- Structure of the Atom
Chapter 4 Atomic Structure
ATOMS Basic building blocks of all matter.
The three SUBATOMIC PARTICLES are
The Structure of the Atom. Subatomic particles Subatomic particles are particles that are smaller than an atom Rutherford had predicted three subatomic.
4.2 The Structure of an Atom This 45-foot-tall steel sculpture is made of 10 tons of steel. If a proton had the same mass as the sculpture, then an electron.
Section 2 The Structure of an Atom. Key Concepts What are three subatomic particles? What properties can be used to compare protons, electrons, and neutrons?
The Structure of an Atom Chapter 4.2. Warm-up: KWL Chart - ATOMS What I Know About Atoms What I Would Like to Learn About Atoms What I Have Learned About.
Atoms, Ions, & Isotopes pg & LO: I can explain the number of protons, electrons, neutrons & overall charge for any element or isotope.
Atomic Structure Review
The Atom.  An atom is the smallest particle of matter that still has the same properties of that element. What is an atom? Atoms = Building Blocks Na.
Atoms Atom- the smallest part of an element Atoms of one element are different from another element. contains protons, electrons, and neutrons Atomic Mass.
6.2 – Atomic Theory Science 10 Mr. Francis. Atoms are made of component particles called subatomic particles: protons, neutrons, and electrons. Atoms.
4.2 The Structure of an Atom This 45-foot-tall steel sculpture is made of 10 tons of steel. If a proton had the same mass as the sculpture, then an electron.
The Chemistry of Life Atoms and Elements Chapter 6.
Atoms and the Periodic table v=pO0X6fVre1I&feature=related v=pO0X6fVre1I&feature=related
Journal #20 1. Who discovered the electron? 2. What did Rutherford discover?
Atomic Theory Observation vs. Inference Square = Model/Theory Activity
Organization of The Periodic Table Open Chemical Building Blocks Book to Page 85. Get chalkboards, chalk, and eraser.
Physical Science: Ch 4 Notes
Unit 3: The Atom. Atoms All matter is made of very tiny particles All matter is made of very tiny particles These particles have the same properties as.
Atomic Mass. Each element found on the periodic table of elements is given an atomic mass The atomic mass tells you the average mass of the atoms of an.
Parts of the Atom: Properties  Protons: –Positive charge –Located in nucleus –Mass = 1 amu (Atomic Mass Unit)  Neutrons –No charge (neutral) –Inside.
Atoms. Structure of Atoms  Atoms are made up of subatomic particles:
EQ: What are the two types of chemical bonds and what makes each one unique?
Nature of Matter. Matter Anything that takes up space Has mass You are made up of matter…and so is everything around you.
Matter, Atoms, Molecules and the Periodic Table
Atoms and Elements. Subatomic Particles Atom- Smallest particle of an element. Subatomic Particles- Atoms are composed of protons, neutrons, and electrons.
Question # 1 How do the physical properties of matter compare to the chemical properties of matter?
Atoms, Elements, & Compounds. Elements Element --- any substance that can’t be broken down into simpler substances. Example of an element --- Oxygen,
4.2 Structure of an Atom Objectives: Identify three subatomic particles and compare their properties Distinguish the atomic number of an element.
Atomic Structure Review Which of the following is NOT true about electrons? a) They have a negative charge b) They are the heaviest subatomic particle.
This 45-foot-tall steel sculpture is made of 10 tons of steel
Bell work – what is an atom?
The Structure of an Atom
This 45-foot-tall steel sculpture is made of 10 tons of steel
This 45-foot-tall steel sculpture is made of 10 tons of steel
This 45-foot-tall steel sculpture is made of 10 tons of steel
Structure of the Atom (Section 4.2)
Distinguishing Among Atoms
9/21/15 ll ork Complete all Bell Work for the week on a sheet of paper. Turn it in by Friday!! 1: What happens when an electron moves from.
This 45-foot-tall steel sculpture is made of 10 tons of steel
This 45-foot-tall steel sculpture is made of 10 tons of steel
Properties of Subatomic Particles
The Structure of an Atom
Counting Subatomic Particles
Presentation transcript:

Properties of subatomic particles Protons Electrons Neutrons Comparing subatomic particles Mention location, mass, and charge of all. Atomic number and mass What are they How are they different What do they tell us about the subatomic particles Isotopes Explain and give examples

This 45-foot-tall steel sculpture is made of 10 tons of steel This 45-foot-tall steel sculpture is made of 10 tons of steel. If a proton had the same mass as the sculpture, then an electron would have a mass of about 5 kilograms.

The Structure of an Atom Properties of Subatomic Particles Protons- a positively charged subatomic particle that is found in the nucleus of an atom. Each proton is assigned a charge of 1+. Each nucleus must contain at least one proton. Rutherford concluded that the amount of positive charge varies among elements.

Electrons- a negatively charged subatomic particle that is found in the space outside the nucleus. Each electron has a charge of 1. Thomson detected the particles that were later named electrons.

Neutrons- a neutral subatomic particle that is found in the nucleus of an atom It has a mass almost exactly equal to that of a proton James Chadwick is a scientist that concluded that the particles he produced were neutral because a charged object did not deflect their paths.

Comparing Subatomic Particles Everything scientists know about subatomic particles is based on how the particles behave in experiments. Scientists still do not have an instrument that can show the inside of an atom.

Comparing Subatomic Particles Protons, electrons, and neutrons can be distinguished by mass, charge, and location in an atom. Protons and neutrons have almost the same mass. About 2000 electrons equal the mass of one proton. An electron has a charge that is equal in size to, but the opposite of, the charge of a proton. Neutrons have no charge. Protons and neutrons are found in the nucleus. Electrons are found in the space outside the nucleus.

19 K Potassium 39.098 Atomic Number Element symbol Atomic Mass

Atomic Number and Mass Number Atomic Number- the number of protons in an atom of that element. All atoms of any given element have the same atomic number. Each hydrogen atom has one proton in its nucleus. Hydrogen is assigned the atomic number 1. Each element has a unique atomic number. Atoms of different elements have different atomic numbers .

Atomic Number and Mass Number Each element has a different atomic number. A The atomic number of sulfur (S) is 16. B The atomic number of iron (Fe) is 26. C The atomic number of silver (Ag) is 47.

Atoms are neutral, so each positive charge in an atom is balanced by a negative charge. That means the atomic number of an element also equals the number of electrons in an atom of that element. Hydrogen has an atomic number of 1, so a hydrogen atom has 1 electron. Sulfur has an atomic number of 16, so a sulfur atom has 16 electrons.

Mass Number- the sum of the protons and neutrons in the nucleus of that atom. To find the number of neutrons in an atom, you need the mass number of the atom and its atomic number.

REVIEW OF Information found on the PERIODIC TABLE Atomic number tells us # of protons. The atomic number also tells us # of electrons. Atomic mass tells us the # of protons + # of neutrons (protons + neutrons = atomic mass) OR (Atomic mass – Atomic Number = neutrons)

What is the atomic number of aluminum? 13 What is the atomic mass of aluminum? 27 How many protons? How many neutrons? 14

Isotopes -atoms of the same element that have different numbers of neutrons and different mass numbers. To distinguish one isotope from another, the isotopes are referred by their mass numbers. For example, oxygen has 3 isotopes: oxygen-16, oxygen-17, and oxygen-18. All three oxygen isotopes can react with hydrogen to form water or combine with iron to form rust.

Isotopes With most elements, it is hard to notice any differences in the physical or chemical properties of their isotopes. Hydrogen is an exception. Hydrogen-1 has no neutrons. (Almost all hydrogen is hydrogen-1.) Hydrogen-2 has one neutron, and hydrogen-3 has two neutrons. Because a hydrogen-1 atom has only one proton, adding a neutron doubles its mass.

Isotopes Water that contains hydrogen-2 atoms in place of hydrogen-1 atoms is called heavy water. Hydrogen-2 atoms have twice the mass of hydrogen-1 atoms, so the properties of heavy water are different from the properties of ordinary water.

In which way do isotopes of an element differ? Assessment Questions In which way do isotopes of an element differ? number of electrons in the atom number of protons in the atom number of neutrons in the atom net charge of the atom

In which way do isotopes of an element differ? Assessment Questions In which way do isotopes of an element differ? number of electrons in the atom number of protons in the atom number of neutrons in the atom net charge of the atom ANS: C

Assessment Questions Of the three subatomic particles that form the atom, the one with the smallest mass is the neutron. True False

Assessment Questions Of the three subatomic particles that form the atom, the one with the smallest mass is the neutron. True False ANS: F, electron