12 - Periodic Table

Question 1

What is the purpose of having a periodic table?

Answer 1

It is a way of classifying elements according to their valence shell and number of electron shells.

Question 2

How is the periodic table arranged?

Answer 2

The periodic table is arranged by their increasing atomic number

Question 3

What are rows named in the periodic table?

Answer 3

Period

Question 4

What are columns in the periodic table called?

Answer 4

Group

Question 5

Where are metals and nonmetals placed?

Answer 5

Metals are in the left and non metals are in the right

Question 6

Why are elements classified based on their group?

Answer 6

Elements with the same group have the same properties

Question 7

What does the group tell you?

Answer 7

The valence electrons of the atom

Question 8

What does the period tell you?

Answer 8

Number of shells the atom has

Question 9

Describe the trends of alkali metals in the periodic table

Answer 9

1. Density Increases
2. Melting point decreases
3. Reactivity increases
4. Softness Increases

Question 10

Describe the trends on halogens in the periodic table

Answer 10

1. Density increases
2. Boiling point increases
3. Reactivity Decreases
4. Color gets deeper

Question 11

Describe the trends in noble gases in the periodic table

Answer 11

1. Density increases
2. Boiling point increases

Question 12

State the properties of alkali metals

Answer 12

1. Low density -> Float in water
2. Soft
3. Good conductors of heat and electricity
4. React violently with water
5. Most reactive metals

Question 13

What is the color of fluorine?

Answer 13

Yellow gas

Question 14

What is the color of chlorine

Answer 14

green gas

Question 15

What is the color of bromine

Answer 15

Red liquid

Question 16

What is the color of iodine

Answer 16

Black/Purple Solid

Question 17

Describe the displacement of halogens

Answer 17

The more reactive halogen will displace the less reactive halogen

Question 18

What is the use of helium?

Answer 18

Used to fill balloons and airships because it is lighter than air

Question 19

What is argon used for?

Answer 19

A filler in tungsten for lightbulbs so that the filament will not burn

Question 20

What is neon used for?

Answer 20

Used in advertising signs because it glows

Question 21

What is krypton used for?

Answer 21

Used for lasers

Question 22

What is xenon used for?

Answer 22

Used for bright light

Question 23

Describe the physical properties of transition metals

Answer 23

Hard, tough, strong
High melting points
Malleable
Good conductors of heat and electricity
High density

No clear trend in reactivity
Form colored compounds
Form ions with different charges
Much less reactive than group 1 elements

Question 24

What are transition metals used for?

Answer 24

They are mostly used for making alloys and steels for construction