Question

An electron: (Select all that apply.)
has a negative charge
is found in the nucleus
emits energy when it moves to a lower energy orbit from an excited state
has the same mass as a proton

Answer 1

has a negative charge and emits energy when it moves to a lower energy orbit from an excited state.

electrons are NOT found in the nucleus but are actually found in rings surrounding the nucleus called orbits.

And while protons and neutrons have reltively the same mass, electrons are about 2000 times lighter. 

Also: side note, when electrons move FROM a lower energy orbit INTO an excited state, it absorbs light.

Answer 2

Answer : The correct options are,

An electron has a negative charge.

An electron emits energy when it moves to a lower energy orbit from an excited state.

Explanation :

As we know that there are three subatomic particles which are proton, neutrons and electrons. The proton which are positively charged and the neutron that is neutral (no charge) both are present inside the nucleus and the electron which are negatively charged and it is present outside or around the nucleus.

As per given in the question,

An electron is a subatomic particle that has a negative charge and it emits energy when it moves to a lower energy state from an excited state.

Where as proton and electrons have different masses but same magnitude of charge with opposite charges.

The mass of proton  = $1.67\times 10^{-27}Kg$

The mass of electron = $9.1\times 10^{-31}Kg$