module 7 structure of matter chemistry

Question 1

matter

Answer 1

is anything that takes up space and has mass.

Question 2

sub-atoms

Answer 2

neutron proton (inside the nucleus) electron

Question 3

valence electrons

Answer 3

the electrons that occupy the outermost regions those farthest from the nucleus.

Question 4

element

Answer 4

substance that is composed of a single type of atom

Question 5

compound

Answer 5

a chemical that contains at least two different types of atoms in a fixed ratio.

Question 6

chemical bonds

Answer 6

attractive forces that hold atoms together

Question 7

organic compoud

Answer 7

compound that contains carbon and hydrogen.oxygen sulfur and nitrogen

Question 8

pure substance

Answer 8

a chemical that contains only one type of element or compound

Question 9

mixture

Answer 9

contains two or more elements or compounds and the ratio of atoms may vary.

Question 10

states of matter

Answer 10

solid, iquid, gases

Question 11

compound

Answer 11

contains two or more different atoms in a fixed ratio.

Question 12

solids

Answer 12

have the least atomic or molecular motion, little movement, the particles vibrate

Question 13

liquid

Answer 13

has more atomic and molecular movement, the particles slide pass and over each other.
fixed volume but no fixed shape

Question 14

gas

Answer 14

the most atomic and molecular movement ,it does not have fixed shape or volume.

Question 15

energy absorcion

Answer 15

releasing energy= cool down

absorbing energy= heat up

Question 16

covalent bond

Answer 16

is a chemical bond that involves the sharing of electron pairs between atoms.