Section 2 - Periodic Table & Bonding

Question 1

what do elements in the same group have in common?

Answer 1

same number of outer electrons and similar properties because of this.

Question 2

number of shells of an element found in …

Answer 2

period

Question 3

characteristics of non-metals

Answer 3

• poor electricity conductors
• they are acidic and neutralise bases

Question 4

characteristics of metals

Answer 4

• good electricity conductors
• they are basic so they will dissolve on water to form pH 7 or more

Question 5

anions

Answer 5

negative ions (gain electrons)

Question 6

cations

Answer 6

positive ions (lose electrons)

Question 7

ions formed from the group number

Answer 7

1. 1+
2. 2+
3. 3+
4. 3-
5. 2-
6. 1-

Question 8

how is a ionic bond produced

Answer 8

transfer of electrons between a non-metal and a metal

Question 9

properties of simple molecular substances

Answer 9

1. atoms within a molecule held together by very strong covalent bonds
2. forces of attraction between molecules are weak
3. this substances have low melting and boiling points because easily separated.
4. As boiling + melting points increase relative molecular mass increases.
5. normally liquid, gas or easily melted solid.

Question 10

Properties of giant covalent structures

Answer 10

1. all atoms bondedto eachother by strong covalent bonds
2. takes a lot of energy to break bonds as there are many, high boiling + melting points
3. Don’t conduct electricity
4. insoluble