Question

what is chemistry

please give me some tanks​

Answer 1

Answer:

Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that make up matter to the compounds composed of atoms, molecules and ions: ...

Answer 2

Answer:

Atomic number of Oxygen is 8

Atomic mass of Oxygen is 16

we know that

Mass number=No. of proton+No. of neutron

No. of neutron in O atom is =16−8=8

No. of proton in O atom=8 (atomic number=no of proton)

No. of electron in O atom=8 (no. of proton=no.of electron for neutral atom)

In O

−2

ion

No. of electron=8+2=10

1mole=6.022×10

23

ions

No. of electrons in 1mole of O

−2

=10×6.022×10

23

=6.022×10

24

No. of protons in 1mole of O

−2

=8×6.022×10

23

=48.176×10

23

No. of neutrons in 1mole of O

−2

=8×6.022×10

23

=48.176×10

23