Atom Structure Review

Which subatomic particles are found in the nucleus of an atom of beryllium? 

• electrons and protons
• electrons and positrons
• neutrons and protons
• neutrons and electrons

Which particle has the least mass? 

• a proton
• a helium atom
• an electron
• a hydrogen atom

The atomic number of an atom is related to:

• the number of protons in its nucleus
• the number of neutrons in the atom
• the number of electrons in the nucleus
• the number of protons and neutrons in its nucleus

The mass number of an atom is related to:

• the number of protons in its nucleus
• the number of neutrons in the atom
• the number of electrons in the nucleus
• the number of protons and neutrons in its nucleus

Which conclusion was drawn from the results of the gold foil experiment? 

• An atom is electrically neutral.
• An atom is mostly empty space.
• The nucleus of an atom is negatively charged.
• The electrons in an atom are located in specific shells.

Which subatomic particles are correctly paired with their charges? 

• electron–positive, neutron–negative, proton–neutral
• electron–negative, neutron–neutral, proton–positive
• electron–negative, neutron–positive, proton–neutral
• electron–neutral, neutron–positive, proton–negative

An isotope is:

• an atom of an element with a different number of protons
• an atom of an element with a different number of neutrons
• an atom of an element with a different number of electrons
• an atom of an element with a different number of protons & neutrons

From the atom shown, we know that:

• the atomic number of carbon is 2.4
• the atomic number of carbon is 6
• the atomic number of carbon is 12
• the mass number of carbon is 6

From the atom shown, we know that:

• titanium has 22 protons
• titanium has 22 neutrons
• titanium has 48 neutrons
• titanium has 48 electrons

From the atom shown, we know that:

• krypton has 78 protons
• krypton has 36 protons
• krypton has 78 neutrons
• krypton has 78 electrons