chem 2

Question 1

basic unit of a chemical element

Answer 1

atom

Question 2

of protons in nucleus

Answer 2

atomic #

Question 3

all material substances are composed of atoms

Answer 3

atomic theory

Question 4

rang of all types of EM radiation

Answer 4

electromagnetic spectrum

Question 5

negatively charged particle

Answer 5

electron

Question 6

group of electrons circulating around a nucleus

Answer 6

electron cloud

Question 7

fixed distances from the nucleus of an atom where electrons can be found

Answer 7

energy level

Question 8

atoms of same element but differing masses

Answer 8

isotope

Question 9

a given compound always has component elements in a fixed ratio and doesn’t depend on source or method of preparation

Answer 9

law of definite proportions

Question 10

diagrams describing chemical bonding between atoms in a molecule

Answer 10

lewis dot diagrams

Question 11

total # of protons and neutrons in an atom

Answer 11

mass #

Question 12

particle with no charge

Answer 12

neutron

Question 13

center of atom

Answer 13

nucleus

Question 14

positively charged particle

Answer 14

proton

Question 15

electrons located at outermost shell of an atom

Answer 15

valence electrons

Question 16

amu

Answer 16

atomic mass unit

Question 17

mass is neither created nor destroyed

Answer 17

law of conservation of mass