Unit 3 test

Question 1

Physical Property

Answer 1

Something that can be observed without changing the identity

Question 2

Chemical Property

Answer 2

A substance’s ability to change into a new substance

Question 3

Periodic table: Chemical symbol

Answer 3

What the chemical name is abbreviated with

Question 4

Atomic Number

Answer 4

How many protons are found in the nucleus

Question 5

Mass Number

Answer 5

Number of protons + Number of neutrons. Does not show up on the periodic table

Question 6

Atomic Mass

Answer 6

The average mass of an element. One proton and one neutron weigh around on amu

Question 7

Elements category

Answer 7

• Metals
• Non-metals
• Metalloids

Question 8

Metals

Answer 8

Shiny, malleable, good conductors

Question 9

Non-metals

Answer 9

Dull, brittle, not malleable, bad conductors

Question 10

Metalloids

Answer 10

some metal properties, some non-metal properties

Question 11

Compounds

Answer 11

A pure substance made of 2 different elements that can be separated by chemical reaction

Question 12

Mixtures

Answer 12

They have different substances mixed together but can be separated by chemical or physical means

Question 13

Chemical formals

Answer 13

The exact number and kind of atoms in a molecule

Question 14

Structure formula

Answer 14

A drawing of a molecule showing the chemical bonds an atoms

Question 15

Physical Change

Answer 15

Change in…
-Shape
-state
-size

Question 16

Chemical Change

Answer 16

Change in…
-energy
-Color
-New gas formation
-Odor
-New substance