Chapter 2 Review - Chemistry

Question 1

Alkaline Earth Metals?

Answer 1

less reactive than AM, will burn in air if heated> produced bright flames (used in fireworks). reacts with water. eg Strontium, Radium, Calcium, Magnesium.

Question 2

Halogens?

Answer 2

non-metals, highly reactive, gases &liquids. room temp. Chlorine, Fluorine, Bromine, Iodine.

Question 3

Noble Gases?

Answer 3

most stable, unreactive elements> room temp = odourless colourless gas. used in lights (argon& neon). helium floats (lighter than air). eg Radon, Krypton, Neon, Helium.

Question 4

Alkali Metals?

Answer 4

highly reactive, reacts with both water and oxygen, low melting points @200 degrees. soft (can be cut with a knife). eg. Lithium, Sodium, Calcium, Potassium.

Question 5

Hard shiny malleable and ductile substances which are good conductors of electricity?

Answer 5

Metals.

Question 6

Another name for the outermost shell?

Answer 6

Valence Shell.

Question 7

The atomic _______ indicates the number of P and N in the nucleus of a particular item.

Answer 7

Mass.

Question 8

The atomic ________ refers to the amount of protons a particular atom contains.

Answer 8

Number.

Question 9

Created the periodic table?

Answer 9

Mendeleev.

Question 10

Elements which share some properties with metals and some with non-metals are classified into this group.

Answer 10

Metalloids.

Question 11

PB?

Answer 11

Lead.

Question 12

1 proton in nucleus?

Answer 12

Hydrogen.

Question 13

Sub-atomic particle that has a mass so low that is it not considered a mass.

Answer 13

Electron.

Question 14

Substances which do not conduct heat or electricity we’ll and are generally gases or brittle solids @room temp.

Answer 14

Non-metals.