Periodic Table

Question 1

What is a Atomic Number ?

Answer 1

An Atomic Number is the proton number .

Question 2

What is the number of protons equivalent to ?

Answer 2

The number of protons is the number of electrons .

Question 3

what is a mass number in a atom ?

Answer 3

A mass number is the nucleon number . It is made up of protons and neutrons .

Question 4

what is the formula for a neutron number ?

Answer 4

The formula of a Neutron number is (mass number - proton number).

Question 5

How many electrons can be placed in the 1st , 2nd and 3rd shells ?

in other words what is the electron configuration .

Answer 5

The 1st shell : Maximum of 2 electrons
The 2nd shell : Maximum of 8 electrons
The 3rd shell Maximum of 8 electrons

Question 5

what are the elements in group 1 called

Answer 5

1. the elements in the first group of the periodic table are alkali metals .

Question 6

what happens when you go down the group in group 1 ?

Answer 6

Going down the group

1. the atomic number increases
2. the number of electrons increases
3. Mass number increases
4. melting & boiling point decreases .
5. reactivity increases

Question 7

elements of the same group (what the the changes and similarities)

Answer 7

1. gradual change in physical properties (melting and boiling point , density , mass)
2. similar chemical properties

Question 8

The characteristics of the group 1 metals

Answer 8

1. the group one metals are soft and can be easily cut
2. the most reactive metal in the periodic table
3. shiny when freshly cut
4. low melting points
5. low density
6. conduct electricity

Question 9

Why some lithium , sodium and potassium stored in paraffin oil ?

Answer 9

These metals are stored in paraffin oil because it is highly reactive with water and air , but if it is in the paraffin oil it prevents it from reacting with air and water .

Question 10

what are the elements in group 7 called ?

Answer 10

The elements in group 7 are called “HALOGENS”

Question 11

are the elements in group 7 metals ?

Answer 11

No. the elements in group 7 are non metals .

Question 12

What happens the more you go down in group 7 ?

Answer 12

The more you go down

1. the atomic number increases
2. the number of electrons increases
3. the mass number increases
4. the melting and boiling point increases
5. reactivity rate decreases .

Question 13

what state are the elements in group 7 when it is in room temperature ?

Answer 13

1. the first two ( fluorine and chlorine) are gases and room temperature .
2. the third elements (bromine) it is a liquid at room temperature .
3. The last two elements (iodine and astatine) are solids at room temperature .

Question 14

what are the characteristics of the elements In group 7 ?

Answer 14

The elements in group 7 are the most reactive non-metals .

Question 15

What is the name of the elements in group 8 and 0 ?

Answer 15

The elements in group 8 and 0 are called the noble gases .

Question 16

how is the reactivity in the 8th and 0 group

Answer 16

It is inert ( chemically unreactive)

Question 17

what happens the more you go down the periodic table in the 8th and 0 group ?

Answer 17

going down the group

1. atomic number increases
2. electron number increases
3. mass number increases
4. melting and boiling point increases
5. there is no reaction so it doesn’t increases nor decrease the reactivity rate when going down the group

Question 18

how many periods are in the periodic table ?

Answer 18

there are 7 rows in the periodic table .

Question 19

how many group are there in the period table ?

Answer 19

there are 8 groups in the periodic table

1,2,3,4,5,6,7,8,0

Question 20

Which one is negative , which ones positive and which one has no charge at all?

(proton , neutron , electron)

Answer 20

proton : positively charge
electron : negatively charged
neutron : no charge

Question 21

how does lithium, react with cold water ?

Answer 21

lithium , when it is in cold water is starts to sizzle , and forms a gas

Question 22

when a gas reacts with water , what name does it have ?

Answer 22

HYDROXIDE

Question 23

how do we test for carbon dioxide ?

Answer 23

using limewater

if the limewater is transparent to a translucent colour it means there is presence of carbon dioxide

Question 24

how do we test for hydrogen

Answer 24

using a lighted splint if there is presence of hydrogen it will produce a pop sound