Unit 2 - Elements and Compounds

Question 1

What are the three parts which make up an Atom?

Answer 1

1. Proton
2. Electron
3. Neutron

Question 2

What is the relationship between the 3 atomic compositions?

Answer 2

• Electrons are not in the nucleus, and surround the middle part –> negative charge (low mass)
• Neutrons and Protons are in the middle (high mass)

Non-isotopes : Protons and Neutrons equal same amount

Question 3

1 amu (atomic mass unit)

Answer 3

1.661 x 10E-24

Question 4

What is an isotope?

Answer 4

Atoms with different number of NEUTRONS

same number of protons and e- but different atomic mass

Question 5

Alkali Metals

Answer 5

• Shiny Solids react violently with water
• Group 1A

Question 6

Alkaline Earth Metals

Answer 6

Group 2A

Question 7

Halogens

Answer 7

Group 7A

Question 8

Noble Gases

Answer 8

8A

Question 9

Ionic Bonding Occurs with which groups?

Answer 9

Bonding between:

metals 1a-3a

transition metals + no metals 5A-7A

Question 10

Covalent Bonding occurs with what groups?

Answer 10

Non-metals

Question 11

What occurs in Ionic Bonding

Answer 11

• Atoms will share electrons with another molecule
• Gain Electron –> Negative Bonding
• Lose Electron –> Positive Bonding

Question 12

Ion Charges

Answer 12

1a - 1+
2a - 2+

3b-2b (Transition Metals –> known will know when given)

3a - 3+
4a - 2+
5a - 3-
6a - 2-
7a - 1-
8a - neutral

Question 13

how do you name cations?

Answer 13

name of element + cationic charge