Atom Basic Structure - 2

Atomic mass unit based on

• carbon

• hydrogen

• Oxygen

• silicon

electron is heavier than neutron

• true

• false

In an uncharged atom, the number of electrons unequal the number of protons

• true

• False

top abundance element is

• carbon

• silicon

• hydrogen

• oxygen

Who create Periodic Table?

• Bohr

• Thompson

• Einstein

• Dmitri Mendelev

Isotope has different number of neutrons

• True

• False

"A" refer to?

• Mass number

• Atomic number

• Atomic symbol

• Neutron number

What force between Proton and Proton

• Nuclear Force

• Negative force

• Electrostatic force

• Repulsive force

Nuclear force makes the nucleus unstable

• true

• false

Instability of a nucleus can be reached either by an excess of protons or by an excess of neutrons

• True

• False