Atomic structure of matter

How many protons does an Oxygen atom have?

• 7

• 8

• 16

• 24

An atom is said to be neutral if it has same number of electrons and...…..

• electrons

• protons

• neutrons

• ions

The subatomic particle has almost no mass is.....................

• proton

• electron

• neutron

• no correct answer

This is how you find the number of neutrons in an atom.

• Subtract atomic number from atomic mass

• Divide atomic mass by the atomic number.

• Subtract the atomic mass from the atomic number.

• Add atomic mass to the atomic number.

The atomic mass is the number of .................+ ........................

• protons , electrons

• electrons, neutrons

• protons , neutrons

• positive ion , negative ion

They are found outside the nucleus and have a negative charge.

• protons

• neutrons

• electrons

• ions

A particles inside the nucleus and have a neutral charge.

• protons

• electrons

• neutrons

• ions

The symbol of Helium is .............................

• H

• He

• Fe

• Al

The symbol of argon is .....................................

• Ar

• Al

• Si

• Ag

The symbol of silver is ......................................

• Fe

• Al

• Ai

• Ag