Atomic strucutre

An element with the same number of protons and neutrons is

• ion

• neutral atom

• isotope

• metal

Answer explanation

neutral atoms have zero net charge because the positively charged protons equals the negatively charged electrons.

Tags

NGSS.MS-PS1-1

the mass of an atom can be found in the

Answer explanation

the mass of an atom is found in the center of the atom and is called the nucleus.

An atom that has lost or gained electrons is

• ion

• molecule

• compound

• isotope

Answer explanation

ion is formed when an element gains or loses electrons resulting in the element having a charge.

Which particles determine the atomic number of an element?

• proton

• electron

• mass

• proton and neutron

An atom that has gained electrons is

• isotope

• cation

• negatively charged

• neutral atom

Answer explanation

atoms that gain electrons become negatively charged ions called anions because there are more negatively charged electrons than positively charged protons

atom with the same number of protons and electrons is

• ions

• neutral atom

• molecules

• isotopes

A sub-atomic particle found in the nucleus with a positive charge and a mass of 1 is

• neutron

• proton

• electron

• mass

Answer explanation

protons are positively charged subatomic particles

A sub-atomic particle found in the nucleus with no charge and a mass of 1 is

• neutron

• proton

• electron

• mass

Answer explanation

neutrons have a mass of 1 and no net charge.

A sub-atomic particle found surrounding the nucleus with a negative charge and no mass is

• neutron

• proton

• electron

• mass

Answer explanation

electrons are negatively charged subatomic particles with no mass.

The center of the atom that contains protons and neutrons is

• mass

• nucleus

• cloud

• shell

Answer explanation

protons and neutrons are contained in the nucleus which is at the center of the atom.