chem part 1

Question 1

Alkai metals

Answer 1

-highly reactive
-react with water to make solutions

Question 2

alkaline metals

Answer 2

-highly reactive
-not as reactive as akali metals

Question 3

halogens

Answer 3

-highly reactive
-react with metals to make salts

Question 4

noble gases/inert gases

Answer 4

-non reactive
-gas at room tempurature

Question 5

protons #

Answer 5

atomic #

Question 6

of protons

Answer 6

of electrons

Question 7

valence

Answer 7

the outermost layer of nucleusis

Question 8

isotope nuclear notation

Answer 8

the symbol of chemical ; top is atomic number : bottom is protons

Question 9

anion

Answer 9

ide

Question 10

cation

Answer 10

ion

Question 11

lose charge

Answer 11

gain electron

Question 12

gain charge

Answer 12

lose electron

Question 13

metallic atoms lose electron valence and from positive ions called

Answer 13

cations

Question 14

non-metallic atoms gain valence electrons and form negative ions called

Answer 14

anions

Question 15

isotopes

Answer 15

different numbers of neutrons for an element

Question 16

metals

Answer 16

-malleable & ductile
-shiny
-solid at room temperature
-conduct a charge

Question 17

non-metals

Answer 17

-hard and brittle
-don’t react
-solid, liquid, gas

Question 18

how do you know a chemical reaction has occurred?

Answer 18

1. change in substance
2. change in phase
3. energy is given off (exothermic / endothermic)

Question 19

chemical properties

Answer 19

reacts with oxygen, water, litmus paper, acids, bases

Question 20

physical properties

Answer 20

change in color, state, boiling temperature, malleable, ductile