Mass number is the number of ……..

Isotopes are atoms with different ……

Isotopes have the same ……….. but different ………

Choose in the correct order.

……… is a characteristic number for all atoms of the same element

What is the protons number of an element with mass. Number = 15, atomic number = 6?

What is the neutrons number of an element with mass number = 24. And atomic number = 13?

What is the number of electrons of an element with atomic number = 30, mass number of 50?

Protium, Deuterium, tritium are isotopes of. ………..

Oxygen is written as O-16.

Number 16 represents ……

For each element, there are two number. The bigger number represents the ……… while the smaller number represents ………

Choose in the correct order.

isotopes have different number of protons

Relative atomic mass is measuring atomic mass relative to …….

Most of the elements are found as mixture of many isotopes for the same element

……. Is the weighted average of all the masses of all isotopes of the element in nature

When we count the charge of the atom, we neglect the charges of ………

When we count the masses of the atom, we mainly neglect the mass of ……

Positive ion means I have …….

Which of those are found in the nucleus of the atom?

If an atom has a total charge of -2, I means it ……

NH4. Is a ……

Atomic mass is the exactly same as the mass number

Mass of the proton is 1 u. The u stands for atomic mass unit.

H2 is …..

NaNO3 is ……..

A compound can be made up of one atom only