Idon’t know how to do this when the atom is made like this

Atom having maximum mass : B

Atom which has least mass  : C

Atom which is neutral : D

Identity of atom D : Lithium

Explanation:

How to look at the Figure :

In the centre  : Proton and neutrons are present

In the rings (outside the centre): electrons are present

Atomic mass : Total number of proton and neutrons present in the nucleus (centre) of the atom.

To calculate atomic mass count the following symbols :

Atomic mass = Proton + neutron

Figure A

= 4

= 3

Atomic mass = 4 + 3 = 7

Figure B

= 4

= 4

Atomic mass = 4 + 3 = 8

Figure C

= 3

= 3

Atomic mass = 3 + 3 = 6

Figure D

= 3

= 4

Atomic mass = 3 + 4 = 7

Part 1 .So B has maximum atomic mass = 8 amu

Part 2. C has minimum mass = 6 amu

To check whether atoms are neutral or charged :

Count the number of protons and electrons

= in the centre

= outside the centre

If the number of proton and electron are equal, then the atom is neutral

Proton = neutron

If the number of proton and electron are not equal, then the atom is Charged

Figure A. = Charged

= 4

= 3

Figure B = Charged

= 4

= 3

Figure C = Charged

= 4

= 2

Figure D = Neutral (equal number of proton and electron)

= 3

= 3

Part C .The atom which is neutral is D

Part DThe identity of  Figure D : Lithium

Atomic number : Total number of proton in the nucleus of the atom

 = 3 = Proton

So it is Lithium (See the periodic table)

i'm assuming that the correct answer is indeed the first one/ "a"..

1 is the answer to this problem