chemistry 7 and 8

Question 1

involves using relationships between reactants and or products in a chemical reaction to determine desired quantitative data

Answer 1

stoichiometry

Question 2

the use of balanced chemical equations in the conversion process

Answer 2

stoichiometry

Question 3

means element

Answer 3

stoikhein

Question 4

metron means

Answer 4

measure

Question 5

stoichiometry literally translated means _

Answer 5

the measure of elements

Question 6

how chemists measure the amount of substance

Answer 6

mole

Question 7

a mole of a substance contains _ representative particles

Answer 7

6.02x10^23

Question 8

is the SI unit for amount of substance

Answer 8

mole

Question 9

the number 6.02x10^23 is called_

Answer 9

Avogadro’s number

Question 10

italian physicist and lawyer who helped clarify the difference between atoms and molecules

Answer 10

Amadeo Avogadro di Quaregna

Question 11

refer to the species present in a particular substance

Answer 11

representative particles

Question 12

can be atoms, molecules, ions, or formula units

Answer 12

representative particles

Question 13

seven elements that exist as diatomic molecules

Answer 13

H2, N2, O2, F2, Cl2, Br2, I2

Question 14

used for compounds that are made up of ions and have primarily ionic bonding

Answer 14

formula mass

Question 15

known as molar mass is used for compounds that are composed of molecules and have primarily covalent bonding

Answer 15

molecular mass

Question 16

a substance which is made up of two or more atoms joined together by a chemical bond

Answer 16

compound

Question 17

two classification of compounds

Answer 17

ionic compound and covalent compound

Question 18

formed between a metal atom and a non metal atom and the type of intramolecular bond exist between atoms is ionic bond

Answer 18

ionic compound

Question 19

formed between two or more nonmetal atoms and type of intramolecular bond that exist between atoms is covalent bond

Answer 19

covalent compound

Question 20

total number of protons and neutrons in the nucleus of an atom

Answer 20

mass number

Question 21

sum of all mass numbers of the atoms that make up the compound

Answer 21

formula mass

Question 22

very important in determining the formula mass of a certain compound

Answer 22

mass number

Question 23

the symbol u means

Answer 23

unified mass number unit or unified atomic mass unit

Question 24

unit that is used in all formula units

Answer 24

the symbol u

Question 25

involves a lot of calculations and formulas

Answer 25

chemistry

Question 26

is the lowest whole numbered ratio of the elements in a compound

Answer 26

empirical formula

Question 27

is the actual composition of a compound indicating the number of atoms per element

Answer 27

molecular formula