Atoms and Atomic Structure

Slides:

Advertisements

Similar presentations

Have a Periodic Table & a calculator per group!.  The mass number.

Advertisements

Chapter 4 Lecture Basic Chemistry Fourth Edition Chapter 4 Atoms and Elements 4.3 The Atom Learning Goal Describe the electrical charge and location in.

Atoms and Atomic Structure

Have 1 Periodic Table per group!.  The mass number.

Defining the Atom All matter is composed of atoms

Subatomic Particles What are three kinds of subatomic particles? 4.2

Chapter 4 Atomic Structure IRON ATOMS.

Slide 1 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Early Models of the Atom II. The Atom : smallest particle of an element that retains.

Early Models of the Atom –An atom is the smallest particle of an element that retains its identity in a chemical reaction. –Philosophers and scientists.

“Atomic Structure”. The Greek philosopher Democritus (460 B.C. – 370 B.C.) The Greek philosopher Democritus (460 B.C. – 370 B.C.) He believed that atoms.

Chapter 4 “Atomic Structure”

Chapter 4.1 Defining the Atom. Democritus (Greece 460 BCE) Believed that atoms were indivisible and indestructible. Believed that atoms were indivisible.

Unit 3 Exam Review.

Atomic Theory and the Atom

Chapter 4: Atomic Structure

Chapter 4 Review “Atomic Structure”

Chapter 4 Atomic Structure

Chemistry Chapter 3 Review Game. ChemistryChemistry Chemistry 1 point 1 point 1 point 1 point 1 point 1 point 1 point 1 point 2 points 2 points 2 points.

Atomic Theory Atoms are incredibly small!

“Atomic Structure” Essential Question: Describe how the model of the atom has changed since the Greek idea of “Atomos”

End Show Slide 1 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Early Models of the Atom An atom is the smallest particle of an element that.

Atomic Theory As Seen Through History

HW for Next Class:  Read pages  Worksheet: 5.2 (Structure of Nuclear Atom)  Quiz: Next time.

PART ONE ATOMIC THEORY. Over the course of thousands of years our idea of what matter is made of and what the atom looks like has changed dramatically.

CHEMISTRY 112 Atomic Structure. Early Models of the Atom An atom is the smallest particle of matter that retains its identity in a chemical reaction Democritus.

Chapter 5 Review. Atomic Theory/Scientists Who was the first person to theorize the existence of the atom in 400 BC? Who was the first person to theorize.

Chapter 4: Atomic Structure

Atomic Structure Atoms and their structure Mr. Bruder.

Chapter 2 Notes Atomic Structure. Atoms Democritus – Ancient Greek Science dude, 1 st proposed the idea of atoms, tiny indivisible particles Atomos –

Atomic Theory: the beginning Chapter 3 Part I. Democritus An Ancient Greek Theorized about the existence of atoms. Did not use Scientific Method.

Unit 2: Atomic Theory and Structure. (c. 400 B.C.) Democritus proposed that “atomos” are indivisible. Atom: smallest particle of matter that retains its.

Atomic Structure Section 4.1 and 4.2.

Discovery of the Atom. Democritus  Democritus was an ancient Greek who had a philosophical idea of an atom.  His approach was not based on the scientific.

Chapter 4 Atomic Structure

Chapter 4: Atomic Structure

Atoms, Atomic Structure and periodic table

Preview Multiple Choice Short Answer Extended Response Standardized Test Preparation Chapter 3.

Atomic Structure. 1. Democritus: Around 300 BC, a Greek philosopher, Democritus stated that everything is made up of tiny, invisible particles He said.

Slide 1 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Atomic Structure Chapter 4 Video 3.

History of Atom Flip Book

Chapter 5 – Atomic Structure Atoms Structure of An Atom Distinguish Between Atoms The Periodic Table.

Atomic Structure. Early Theories of Matter Science as we know it did not exist several thousand years ago.

Chapter 4 – Atomic Structure

The Structure of the Atom Chapter 3 Chemistry: Matter and Change.

Do Now: Solve the following using the correct number of significant figures. 1)7.76 m m = 2)5.750 cg cg = 3)5555 kg kg = 4)1.23 m x 3.2.

The Atom. Dalton’s Atomic Theory 1.Elements are made of tiny particles called atoms. 2.All atoms of a given element are identical. 3.The atoms of a given.

Ariana Garcia-Minsal. Dalton's Atomic Theory - (1808) His atomic theory could be summarized as: 1)Matter is composed of tiny and indivisible particles.

End Show Slide 1 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Early Models of the Atom An atom is the smallest particle of an element that.

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.

ATOMS!. Early models of the atom The existence of the atom was first proposed by Democritus of Abdera who lived in Greece during the 4th century B.C.

Why was Dalton’s idea of the atom considered a theory while Democritus’ idea was considered a hypothesis? A.Democritus was born in Thrace. B.Dalton had.

Chapter 4 Practice Questions. Which subatomic particle has a negative charge? 1.electron 2.proton 3.neutron 4.nucleus

Answers (2) D (12) C (22) D (32) C (3) A (13) B (23) A (33) A (4) B (14) C (24) C (34) B (5) D (15) B (25) B (6) C (16) D (26) D (7) C (17) B (27) A (8)

Greek Philosop hers Dalton’ s Atomic Theory How atoms differ Radioac tivity Types of radiatio n The atom Subatomic.

Smallest particle of an element that retains the properties of the element.

Atomic Structure CHAPTER 4. Defining the Atom ✴ An atom is the smallest particle of an element that still has the chemical properties of that element.

Class Notes: Atomic Models. Democritus= 400 B.C. – said the world was made of two things: empty space and tiny particles called “atoms” --said atoms were.

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.

Chapter 4. ◦ The lab technician shown here is using a magnifying lens to examine a bacterial culture in a petri dish. When scientists cannot see the details.

Chapter 4 Atomic Structure

Atoms! What is matter made of?.

Chapter 4 Atomic Structure 4.2 Structure of the Nuclear Atom

4.1 & 4.2 Early Theories & Subatomic Particles

More 4.3 Potpourri

Chapter 4 Atomic Structure and Theory

Atomic Structure An atom is the smallest particle of an element that retains its identity in a chemical reaction. Although early philosophers and scientists.

4.1 Defining the Atom 4.2 Atomic Structure

Atomic Structure.

Presentation transcript:

Atoms and Atomic Structure Unit 2 Review Atoms and Atomic Structure

1. The letter “X” in the diagram above marks the: Location of the neutrons Region of greatest density Electron cloud Location of the protons

2. The region labeled "Y" in the diagram has a charge that is: Positive Negative Neutral None of the above

The number of protons in the nucleus The number of electrons 3. Isotopes (such as hydrogen-1, hydrogen-2, and hydrogen-3) are atoms of the same element that differ in: The number of protons in the nucleus The number of electrons The atomic number The number of neutrons in the nucleus

4. The atomic number of an element is equal to: A. the number of protons in the nucleus B. the number of protons plus the number of electrons C. the number of protons plus the number of neutrons D. the number of neutrons in the atom

5. The charge and mass number of an electron are: A. charge = 0, Mass number = 1 B. charge = +1, Mass number = 0 charge = +1, Mass number = 1 charge = -1, Mass number = 0

6. A fictitious element X is composed of 10 6. A fictitious element X is composed of 10.0 percent of the isotope X-55 , 20.0 percent of the isotope X-56 , and 70.0 percent of the isotope X-57 . Estimate the atomic mass of element X. A. 57 amu B. 57 C. 56.6 amu D. 56.6

7. Which of the following is true about subatomic particles? Electrons are negatively charged and are the heaviest subatomic particle. Protons are positively charged and the lightest subatomic particle. Neutrons have no charge and are the lightest subatomic particle. The mass of the neutron nearly equals the mass of a proton.

8. The mass number of an atom is determined by: A. the number of protons only B. adding the neutrons and electrons C. adding the neutrons and protons D. adding the protons and electrons

9. The nucleus of most atoms is made up of: A. electrons and protons B. protons and electrons C. neutrons and electrons D. protons and neutrons

10. In which of the following sets is the symbol of the element, number of protons, and the number of electrons given correctly? In, 49 protons, 49 electrons Zn, 30 protons, 60 electrons Cs, 55 protons, 132.9 electrons F, 19 protons, 19 electrons

11. Which of the following is correct concerning subatomic particles? The electron was discovered by Goldstein in 1886. The neutron was discovered by Chadwick in 1932. The proton was discovered by Thomson in 1880. Cathode rays were found to be made of protons.

A. Uranium-238 has a larger electron cloud than uranium-235 12. An atom of uranium-238 differs from an atom of uranium-235 in the following way: A. Uranium-238 has a larger electron cloud than uranium-235 B. Uranium-238 has three more neutrons than uranium-235 C. Uranium-238 has three more protons than uranium-235 D. Uranium-238 has three more electrons than uranium-235

13. Which of the following is NOT a part of Dalton’s atomic theory? All elements are composed of atoms. Atoms are always in motion. Atoms of the same element are identical. Atoms that combine do son in simple whole-number ratios.

14. Which of the following statements is NOT true? Atoms of the same element can have different masses. Atoms of isotopes of an element have different numbers of protons. The nucleus of an atom has a positive charge. Atoms are mostly empty space.

15. Which of the following accurately summarizes the isotope Argon-40? A. 18 protons, 18 electrons, 22 neutrons B. 39.95 protons, 39.95 electrons, 21.05 neutrons C. 22 protons, 22 electrons, 18 neutrons D. 40 protons, 40 electrons, 18 neutrons

16. Which of the following was NOT among Democritus’ ideas? Matter consists of tiny particles called atoms. Atoms are indivisible. Atoms retain their identity in a chemical reaction. Atoms are indestructible.

17. As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to be true? Protons, electrons, and neutrons are evenly distributed throughout the volume of the atom. The nucleus is made of protons, electrons, and neutrons. Electrons are distributed around the nucleus and occupy almost all the volume of the atom. The nucleus is made up of electrons and protons.

Answers 1. C 6. C 11. B 16. C 2. A 7. D 12. B 17. C 3. D 8. C 13. B A 9. D 14. B D 10. A 15. A