The Structure of Atom

All the following are basic form of matter, except

• solid

• liquid

• gas

• chemical

The innermost orbital electron is

• K

• L

• M

• N

Electrons travel in a circular path around the nucleus

• true

• false

If energy is added to an electron, the electron move to the new orbit known as

• lower energy level

• excited state

• ground state

Electron in an excited state, may return to ground state by emitting energy during its transmission.

• true

• false

Nucleus consist a combination of

• proton and electron

• proton and neutron

• electron and neutron

Subatomic particle which has a positive charge is

• neutron

• proton

• electron

The lightest particle in the atom is

• proton

• neutron

• electron

Atomic mass is refers to

• proton number

• combination of proton and electron

• combination of proton and neutron

Atomic number is number of proton in an atom

• true

• false