Atoms Introduction

Multiple Choice

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

• Protons and neutrons

• Electrons and protons

• Neutrons and electrons

• Only protons

Multiple Choice

What is the main difference between the nucleus and the electron cloud in an atom?

• The nucleus is dense and central, while the electron cloud is a large area outside the nucleus.

• The nucleus contains electrons, while the electron cloud contains protons and neutrons.

• The nucleus is negatively charged, while the electron cloud is positively charged.

• The nucleus is tiny, while the electron cloud is large and dense.

Multiple Choice

Which of the following statements about subatomic particles is correct?

• Protons have a positive charge and are large.

• Neutrons have a negative charge and are tiny.

• Electrons have a positive charge and are large.

• Protons have no charge and are tiny.

Open Ended

An atom has 24 protons. What element is it?

Multiple Choice

Which of the following statements is true about neutral atoms?

• They have equal numbers of protons and electrons.

• They have more protons than electrons.

• They have more electrons than protons.

• They have no protons.

Multiple Choice

How do you calculate the number of neutrons in an atom if you know its mass number and atomic number?

• Subtract the atomic number from the mass number.

• Add the atomic number to the mass number.

• Multiply the atomic number by the mass number.

• Divide the mass number by the atomic number.

Multiple Choice

Which of the following best describes atomic mass?

• The average mass of all isotopes of an element.

• The sum of protons and neutrons in an atom.

• The number of protons in an atom.

• The number of neutrons in an atom.

Multiple Choice

What would be the Isotope of Carbon-16

• Protons: 8

  Neutrons: 8

• Protons: 6

  Electrons: 10

• Protons: 6

  Neutrons: 10

• Protons: 8

  Electrons: 8

Categorize

Options (2)

Becomes an Ion

Becomes a different element

What happens when the number of _______ change?

Electrons

Protons