Chemistry

Question 0

Group 1

Answer 0

Alkali metals

Question 1

Isotopes

Answer 1

Atoms of the same element that contain different numbers of neutrons

Question 2

Group 2

Answer 2

Alkaline Earth Metals

Question 3

Group 6

Answer 3

Chalcogens

Question 4

Group 7

Answer 4

Halogens

Question 5

Group 8

Answer 5

Noble Gases

Question 6

Groups 3-12

Answer 6

Transition metals

Question 7

Average mass of one isotope

Answer 7

Total mass of all atoms in an isotope/Total numbering atoms of that isotope

Question 8

Relative Abundance

Answer 8

Number of atoms in an isotope/ total number of atoms *100

Question 9

Relative mass

Answer 9

Relative abundance*average mass

Question 10

Ionic Bonding

Answer 10

-when electrons are transferred from metal to non metal

Question 11

Covalent Bonding

Answer 11

-takes place between 2 non metals which share electrons to form a bond

Question 12

Orbitals

Answer 12

S:- 2 electrons
P:- 6 electrons
D:- 10 electrons
F:- 14 electrons

Question 13

Metals vs. Nonmetals

Answer 13

Metals:- malleable, ductile, conductors, shiny, high melting or boiling points, high densities, low electronegativity
Nonmetals:- brittle, not ductile or malleable, dull, poor conductors, low densities, high electronegativity

Question 14

Periodic trends in atomic radius, electronegativity, ionization energy

Answer 14

Atomic radius:- group: increases period: decreases
Electronegativity:- group:- decreases period: increases
Ionization energy:- group:- decreases period: increases

Question 15

Chemical Equation

Answer 15

A shorthand expression that represents a chemical reaction

Question 16

Chemical Reaction

Answer 16

A process where one or more substances are change into one or more new substances

Question 17

Synthesis

Answer 17

2 or more substances are combined to form a compound

Question 18

Decomposition

Answer 18

Opposite of synthesis:- breaking down to form simpler substances

Question 19

Combustion

Answer 19

A substance combines with oxygen forming carbon dioxide and water

Question 20

Single replacement

Answer 20

When one element takes the places of another. Metal replaces metal and nonmetal replaces nonmetal

Question 21

Double replacement

Answer 21

The positive metal ion of one compound combines with a negative ion of the other compound and vice versa.

Question 22

Diatomic elements

Answer 22

Hydrogen, nitrogen, fluorine, chlorine, bromine, iodine, oxygen

Question 23

Avogadro’s Constant

Answer 23

6.02 * 10^23

Question 24

Number of particles

Answer 24

Moles* Avogadro’s constant

Question 25

Molarity

Answer 25

of moles of dissolved substance/volume in L

** volume always in L