basic chemisty

Question 1

matter

Answer 1

anything that takes up space

Question 2

states of matter

Answer 2

solid
liquid
gas

Question 3

Elements

Answer 3

make up matter

Question 4

four elements that make up 90% of the human body

Answer 4

Carbon
Nitrogen
Oxygen
Hydrogen

Question 5

Atoms

Answer 5

smallest unit of an element

Question 6

in shells

Answer 6

innermost can have 2 electron

Outer can have up to 8

of electrons in outer shell determine chemical properties of an atom

Question 7

atomic number

Answer 7

Number of protons in nucleus

Question 8

Atomic Weight

Answer 8

number of protons plus the number of neutrons

Question 9

Mole

Answer 9

Measurement for the number of atoms

Question 10

isotopes

Answer 10

Variations of one type of atom

Question 11

Radioactive Isotopes

Answer 11

Unstable isotopes that break down over time

Release detectable energy

Question 12

Molecules

Answer 12

forms when atoms bond to each other

Question 13

Compounds

Answer 13

formed when atoms of different elements bond

Question 14

Ionic bond

Answer 14

created by electrical attraction between ions

they form when an atom gains or loses electrons in its outer energy level to become stable

Question 15

Covalent Bond

Answer 15

created when atoms share electrons