Atoms, Elements, & The Periodic Table

Which two subatomic particles are found inside the nucleus (center of the atom)?

• protons and electrons

• electrons and neutrons

• protons and neutrons

What is the center of the atom called?

• electron cloud

• neutron

• nucleus

• proton

The number of protons is usually equal to the number of...

• neutrons

• electrons

• atoms

• Noble Gases

Which particle determines the identity of an element?

• neutron

• proton

• electron

• nucleus

Which group of elements is LEAST LIKELY to combine or react with other elements?

• Alkali Earth Metals

• Alkali Metals

• Noble Gases

• Halogens

What is the maximum number of electrons that the first energy level/ring can hold?

• 8 electrons

• 2 electrons

• 18 electrons

What is the maximum number of electrons that the second energy level/ring can hold?

• 18 electrons

• 2 electrons

• 8 electrons

What is the name of a charged atom?

• proton

• ion

• nucleus

Tags

NGSS.MS-PS2-3

Which of the following represents the total mass of protons, neutrons, and electrons in an atom?

• atomic number

• atomic mass

• chemical symbol

• element's name

Which of the following represents the total number of protons in an atom?

• atomic mass

• atomic number

• nucleus

• chemical symbol