Atoms

Question 1

Do atoms have a charge ?

Answer 1

No because the number of the electrons is the same as the number of protons so the charges cancel out

Question 2

What is the atomic number ?

Answer 2

Smaller number, tell us the number of protons in an atom of the element.

For example, Lithium has a atomic number of 3

Question 3

What is the mass number ?

Answer 3

Its the bigger number this tells us the total number of protons and neutrons added .

Mass number -Atomic number =number of neutrons

Question 4

What are Isotopes ?

Answer 4

They are atoms of an element with a different number of neutron

Question 5

What is Relative atomic /weights and mass ?

Answer 5

Number of protons /neutrons

Question 6

Workout the relative formula weight of the following ?

Answer 6

1. H20= (2x1.01) + 15.999=18
2. cH4=12.01+(4x1.01)=16
3. c6H1206=(6x12.01) +(12x1.01) +(6x15.9999) =180
4. NACI=22.99+35.45 =58.44