Periodic Table3

Question 1

What are the general characteristics of non-metals?

Answer 1

1- Poor conductors of heat and electricity,

2-most are gases at room temperature

3-few are solids like sulfur and phosphorus

Question 2

What is a metalloid?

Answer 2

An element that has properties similar to both metals and non-metals

*The behaviour of a metalloid can be controlled by changing conditions.

Question 3

Which elements are referred to as the representative elements?

Answer 3

Elements in groups IA through 7A

*These elements display a wide range of physical and chemical properties.

Question 4

What are the characteristics of hydrogen?

Answer 4

Belongs to a family of its own, diatomic, reactive gas

*Hydrogen was involved in the explosion of the Hindenburg and is considered a promising alternative fuel source.

Question 5

What is the reactivity of alkali metals?

Answer 5

Very reactive, always combined with something else in nature

1-They are found in the first column of the periodic table (not including hydrogen)

2-and are soft enough to cut with a butter knife.

Question 6

What are alkaline earth metals?

Answer 6

Reactive metals found in the second column of the periodic table (group 2), always combined with non-metals

*Elements like magnesium (Mg) and calcium (Ca) are important mineral nutrients.

Question 7

What defines transition metals?

Answer 7

Elements in groups 3-12, less reactive, harder metals

Transition metals exhibit unique properties

Question 8

Transition metals: metals used as medals, include:

Answer 8

Used in jewellery and construction.

Question 9

What are the elements in group 17 called?

Answer 9

Halogens

Question 10

What is the reactivity level of halogens?

Answer 10

Very reactive

Question 11

What state of matter are halogens typically found in?

Answer 11

Diatomic, non-metals

Question 12

In what form are halogens typically found in nature?

Answer 12

Combined with other elements

Question 13

What are the elements in group 18 called?

Answer 13

Noble Gases

Question 14

What is the reactivity level of noble gases?

Answer 14

Very unreactive

Question 15

What physical state do noble gases exist in?

Answer 15

Monatomic gases

Question 16

What are two common uses of noble gases?

Answer 16

• Neon signs
• blimps

Question 17

Why are noble gases considered unreactive?

Answer 17

They have a full valence shell

Question 18

Are noble gases considered a representative group?

Answer 18

No

Question 19

How many outer electrons do halogens have?

Answer 19

7

Question 20

Halogens are used as:

Answer 20

1-Disinfectants

2- To strengthen teeth