2 - (Atomic Structure)

Question 1

Define an element.

Answer 1

• A substance which is made up of only 1 type of atom (same no. of protons) in it.
• Elements cannot be broken down into anything simpler by chemical reactions.

Question 2

Define a compound.

Answer 2

• A pure substance made up of two or more elements chemically combined.
• Cannot be separated.

Question 3

Define a mixture.

Answer 3

• A combination of two or more substances (elements/compounds) that are not chemically combined.

Question 4

What is an atom made of?

Answer 4

Subatomic parties

Question 5

What are the subatomic particles.

Answer 5

1. Protons
2. Neutrons
3. Electrons

Question 6

What is the relative mass of the subatomic particles?

Answer 6

1. Protons - 1
2. Neutrons - 1
3. Electrons - 1/1840

Question 7

What is the charge of the subatomic particles?

Question 8

What does one relative atomic mass equal to?

Answer 8

One relative atomic mass unit is equal to1/12th the mass of carbon -12th

Question 9

What is the atomic no. ?

Answer 9

Proton number ( The no. of prtons in an element)

Question 10

What is the mass no. ?

Answer 10

Total no. of neutrons + protons

Question 11

What is another name for mass no. ?

Answer 11

Nucleon Number

Question 12

How do we find the neutron no. ?

Answer 12

Nucleon no. - proton no.

Question 13

Where is atomic no. n mass no. found?

Answer 13

Atomic no. = Bottom
Mass no. = Top

Question 14

If it is an ion what is important to note?

Answer 14

Proton no. will never change.

Question 15

How do we find the no. of protons?

Answer 15

mass no. - No. of neutrons

Question 16

Why does an atom have the same no. of electrons and protons?

Answer 16

An atom is neutral

Question 17

What is an easy way to know the mass no. in exams in periodic table?

Answer 17

MASS = MASSIVE (It will always be the larger no. )