Atoms and the Periodic Table

What is the central core of an atom containing protons and usually neutrons called?

• Proton

• Electron

• Nucleus

• Isotope

Which particle is a small, positively charged particle in the nucleus of the atom?

• Neutron

• Electron

• Proton

• Isotope

What is a small particle in the nucleus of the atom, with no electrical charge?

• Electron

• Neutron

• Proton

• Chemical symbol

What is a tiny, negatively charged particle that moves around the nucleus of an atom?

• Proton

• Neutron

• Electron

• Isotope

Tags

NGSS.MS-PS2-3

What does the atomic number represent?

• Number of neutrons

• Number of electrons

• Number of protons

• Mass number

What is an atom with the same number of protons and a different number of neutrons from other atoms of the same element called?

• Isotope

• Electron

• Proton

• Period

What is the total number of protons and neutrons in the nucleus of an atom called?

• Atomic number

• Mass number

• Atomic mass

• Group

What is the average mass of all the isotopes of an element?

• Atomic number

• Mass number

• Atomic mass

• Period

What is a chart of the elements showing the repeating pattern of their properties?

• Chemical symbol

• Periodic table

• Group

• Isotope

What is a one or two letter representation of an element?

• Period

• Group

• Chemical symbol

• Isotope