When neutrally charged, atomic number equals the number of _________.

• Protons or Electrons

• Protons or Newtons

• Neutrons or Electrons

• Protons or Neutrons

The mass number is equal to the number of _________.

• protons and neutrons
• neutrons only
• electrons and protons

• protons only

Subtracting the atomic number from the mass number will give you the number of _________.

• electrons
• isotopes
• protons
• neutrons

Two different isotopes of the same element have different numbers of _________.

• protons
• neutrons
• electrons
• quarks

Unstable isotopes that emit radiation and decay into other isotopes are known as __________.

• Chemical isotopes

• Radioisotopes

• Nuclear-isotopes

• Stable isotopes

Tags

NGSS.HS-PS1-8

Electrons are spread throughout the atom, like blueberries in a muffin. What model is this describing?

• Plum-Pudding

• Cathode Ray

• Anode Ray

• Rutherford

Which of the following is the central region of an atom?

• Core

• Isotope

• Nucleus

• Orbital

Tags

NGSS.HS-PS1-8

What are the four types of electron orbitals in order?

• s, p, d, q

• w, a, s, d

• s, p, f, u

• s, p, d, f

What is the formula for calculating the number of neutrons in an atom?

• Mass number - Atomic number

• Atomic number - Mass number

• Mass number + Atomic number

• Atomic number + Electrons

Which subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus