Chemical Symbols and Formulas

Slides:

Advertisements

Similar presentations

Chapter 9 Compounds Lesson 1 Notes.

Advertisements

CHEMICAL COMPOUNDS AND FORMULAS

A review of elements, molecules, and compounds

Unit 1A | ACS Chemistry in the Community, Sixth Edition | ©2012 BFW Publishers Unit 1A ACS Chemistry in the Community Sixth Edition.

Page 30: Counting Elements and Atoms Practice Page 31: Review of Elements and Compounds.

Unit 4: What is Matter Made of?

Counting Atoms Obviously, there are more materials in the world than just 100 or so elements on the periodic table.

Counting Atoms in Compounds. Chemical Formulas All the elements have symbols that are listed on the periodic table. Some elements have one letter and.

Molecules and Compounds. Compound Formed from 2 or more elements in a specific proportion When combined, new properties are created They contain 2 or.

Chemical Formulas. Chemical Formula: An easy way for scientist to describe a molecule using the element symbols. H2OH2O C0 2 NaCl.

. 9/26/11 62 Counting Atoms 10/15/ Counting Atoms 10/15/2013 Starter: How many elements are in the following compounds : H2O, NaCl, Cl2 Application.

The Language of Chemistry Matter, Symbols, Formulas & Chemical Equations.

CHAPTER 2: ATOMS AND MOLECULES Chemistry 140 HCC/TCHS.

Chapter 2 Elements & Compounds. 2.1 Models of Matter: The Particle Theory 2000 years ago a philosopher named Democritus suggested that matter was made.

1.There are billions of materials in our universe. 2.Those materials are made up from about 100 elements only. Atoms and Elements.

A molecule is a group of 2 or more atoms linked together chemically. Ex: H 2 0, CH 4, O 2,H 2,O 3 A compound is a molecule that contains 2 or more different.

Nomenclature Writing and Naming Chemical Compounds.

*Opposites Attract* Sodium transfers 1 valence electron to chlorine.

(2.3) CHEMICAL EQUATIONS (p ). Recall: Word Equation A word equation - states what reacts and what is produced - uses words instead of formulas.

Li Bell Work Nov 17, 2014 (1) Na (atomic number is 11)

Element Bonding Pages SCOS 4.02: Evaluate evidence that elements combine in many ways to produce compounds that account for all living and nonliving.

Counting Atoms in Chemical Formulas Hooray. Counting Atoms 1) Start at the left side of the formula and underline the capital letter plus any lower case.

BALANCING CHEMICAL EQUATIONS Chapter 6.5 DAY 1 & 2.

Elements and Compounds. What is an element? A pure substance composed of the same type of atom throughout. Cannot be broken down into simpler substances.

Chemical Symbols and Formulas 2.7. Chemical Symbols A Chemical symbol is an abbreviation of a name of an element. Capital letter if only one letter. Only.

Molecules, Atoms and Compounds

7.5.5 Translate chemical symbols and the chemical formulas of common substances to show the component parts of the substances.

Notes Tennessee SPI Objective: Classify common substances as elements or compounds based on their symbols or formulas Science Essential Learning Students.

Elements are pure substances that can not be broken down into simpler substances. Ex. Calcium, Hydrogen, Fluorine A pure substance is one that contains.

Atomic Structure. Atomic number – number of protons Mass number – number of protons + neutrons Protons (+)electrons (-) Neutrons (neutral) Energy levels.

Chemical Formula atom molecule compound ex: H 2 0, NaCl element O O 2 matter.

Unit 1A | ACS Chemistry in the Community, Sixth Edition | ©2012 BFW Publishers Unit 1A ACS Chemistry in the Community Sixth Edition.

Chemical Symbols and Formulas. Chemical Symbols  All elements in the Periodic Table have symbols that are recognized world wide.  It does not matter.

 Take article periodic table read and answer question in Isn  Homework: finish scavenger hunt paper. Start studying your voc and metals vs non metals.

PS.2b Compounds. Compounds are made of 2 or more kinds of atoms which combine in a specific ratio.

Chemical Formulas. At the end of the day you will be able to: Identify elements in a formula Determine how many of each element are present.

What is Matter made of? Atoms – the basic particle of which all matter, EVERYTHING, is made * A sheet of paper is approximately 10,000 atoms thick.

8 th Grade ScienceRSM Go to work station 1 or 2 and get the following items  One small dry-erase board  One dry-erase marker  A paper towel  Wait for.

2.7 CHEMICAL SYMBOLS AND FORMULAS. CHEMICAL SYMBOLS A Chemical symbol is an abbreviation of a name of an element. Capital letter if only one letter. Only.

An Atom is ……………. An Element is …………... A Compound is ………….

Organic Compounds A review of elements, molecules, and compounds.

Bell Ringer Bell Ringer 1. What is Sodium’s atomic mass? 2. How many protons does sodium have? 3. How many neutrons does sodium have?

Combination of Atoms. Chemical Symbols  All elements in the Periodic Table have symbols that are recognized world wide.  It does not matter which country.

B.6 Symbols, Formulas, and Equations. Chemical Language Letters Symbols Words Formulas Sentences Equations.

Elements, Compounds and Mixtures Ms. O’Rourke Chapter 20.

Notes Tennessee SPI Objective: Classify common substances as elements or compounds based on their symbols or formulas. Science Essential Question(s) How.

2.7 Chemical Symbols and Formulas All elements on the periodic table have symbols that are recognized world wide. It does not matter which country you’re.

Compounds and Chemical Formulas. ELEMENTS - Review a pure substance that cannot be separated into simpler substances made of all the same atoms Identified.

Page 4 notes.  Atoms are made of three (3) smaller particles called:  PROTONS – Positively charged particles (+)  NEUTRONS – Particles with NO charge.

Bell Work Apr 14, 2015 Instructions: On your paper, do the following… 1) Select the best answer (just write letter A or B) 2) Explain what is wrong with.

Chemical Symbols and Formulas. Chemical Symbols  All elements in the Periodic Table have symbols that are recognized world wide.  It does not matter.

Science Chapter B1 Classifying Matter.

Elements and Compounds

What is Matter made of? Atoms – the basic particle of which all matter, EVERYTHING, is made * A sheet of paper is approximately 10,000 atoms thick.

Formulas Combining symbols of different elements in a compound is called a chemical formula. Metal written first, non-metal written second. Example: Na.

Compounds and mixtures

Chemical Symbols and Formulas

Chemical Symbols and Formulas

Elements and Compounds

CaCO3 Aspirin C9H8O4 Pyrite (Fools Gold) FeS2 Mg(OH)2 Chemical Formula and Atoms Review Name Formula Atoms in Formula Calcium Carbonate CaCO3 Aspirin.

Elements and Compounds

What is Matter made of? Atoms – the basic particle of which all matter, EVERYTHING, is made * A sheet of paper is approximately 10,000 atoms thick.

Compounds & Formulas.

Elements, Compounds and chemical formulas

Chemical Formulas A compound is represented by giving its chemical formula, a notation that uses atomic symbols with numerical subscripts to convey the.

Chapter 2 Section 2 What are chemical formulas?

Chemical Formulas Scientists developed a shorthand method of representing elements and compounds. Chemical Symbol: Either a single capital letter of capital.

Chemical Formulas Scientists developed a shorthand method of representing elements and compounds. Chemical Symbol: Either a single capital letter of capital.

Chemical Symbols and Formulas

Presentation transcript:

Chemical Symbols and Formulas Chapter 2.7

Chemical Symbols All elements in the Periodic Table have symbols that are recognized world wide. It does not matter which country you are in or the language you speak. Example: The element Iron is always identified by “Fe” and Oxygen is “O”. The names are not always the same but the symbols are. “Fe” is iron in Canada, fer in France and fier in Romania.

Chemical Symbols A Chemical symbol is an abbreviation of a name of an element. Capital letter if only one letter. Only first letter capital if more than one letter Element Chemical Symbol Oxygen O Nitrogen N Hydrogen H Sodium Na

Sodium comes from the word sodanum, a headache remedy, and it’s symbol (Na) comes from the Latin word Natrium.

Chemical Formulas A chemical formula is the combination of symbols that represent a particular compound. The chemical formula indicates which elements are present in the compound and in what proportions. Ex. 1: Water molecule H2O: 2 atoms of hydrogen, 1 atom of oxygen Ex. 2: Iron Oxide molecule Fe2O3: 2 atoms of iron, 3 atom of oxygen

Chemical Formulas - Examples Calcium Carbonate (chalk) – CaCO3 Sodium Chloride (salt) – NaCl Acetysalicylic acid (aspirin) – C9H4O8 Acetic acid (vinegar) – C2H4O2

Chemical Formulas NOTES: - Each symbol in a formula represents an element. - If only one atom of an element is present in the compound, no subscript is used. - If more than one atom of an element is used, then the symbol is followed by a number indicating how many atoms are used. This is called the subscript.

Homework Do Questions #1–5 on Page 59 You may use your Periodic Table. Make sure that for each question you write out that question first then you write your answer and then continue on to the next question and so on until completed.

2 atoms of hydrogen (in a hydrogen molecule) 1 atom of sodium 2 atoms of hydrogen (in a hydrogen molecule) 3 atoms of magnesium 2 atoms of phosphorus 8 atoms of oxygen 13 total atoms 3 carbon atoms

Tomorrow Go over counting atoms worksheet Pass in Homework Chapter 2 quiz