8.5A and 8.5B Protons, Neutrons, and Electrons

An element’s reactivity and other chemical properties are determined by the number of -

• isotopes it has

• oxidation states

• orbitals in an atom

• valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Molybdenum has an atomic number of 42. This means that molybdenum –

• has a freezing point of 42° Fahrenheit.

• belongs to Group 42 on the Periodic Table.

• can form 42 bonds with other atoms.

• contains 42 protons in its nucleus.

Tags

NGSS.HS-PS1-1

Which of the following properties of carbon distinguishes it from all other elements?

• Carbon has six protons in its nucleus.

• Carbon is a gray solid at room temperature.

• Carbon forms compounds with oxygen

• Carbon can be found in Earth’s crust.

Tags

NGSS.MS-PS1-1

The table provides information on four different elements. Based on the information provided, it can be concluded that –

• sodium is the most reactive.

• strontium is the best conductor.

• phosphorus is the least stable.

• aluminum has the most protons.

Tags

NGSS.MS-PS1-1

What is the name for the type of subatomic particle that is electrically neutral and found in the nucleus of an atom?

• Proton

• Neutron

• Ion

• Electron

Which particles would you find in the nucleus of an atom?

• Protons and neutrons

• Electrons and protons

• Electrons only

• Neutrons and electrons

Which subatomic particle(s) would be found orbiting around the nucleus?

• Electrons and protons

• Neutrons only

• Protons and neutrons

• Electrons only

Which of the following correctly lists the pair of subatomic particles that balance the charge of the atom?

• Protons and neutrons

• Electrons and neutrons

• Protons and electrons

• Electrons and ions

What is the mass of an atom with seven protons, seven neutrons, and eight electrons?

• 15

• 14

• 13

• 22

A form of charge, designated negative, positive, or neutral (without charge) that is found on the subatomic particles that make up all atoms.

• atomic mass

• p+

• e-

• electrical charge