Atomic Theory Test Review

Two or more forms of the same element will have the same number of protons, but different numbers of neutrons. This is referred to as a(n) ______.

• isotope

• mass number

• atomic number

• electron number

What is the structural difference between Nitrogen-14 and Nitrogen-15?

• Nitrogen-14 and Nitrogen-15 have the same number of neutrons

• Nitrogen-14 has 7 protons and 7 neutrons; Nitrogen-15 has 7 protons and 8 neutrons

• Nitrogen-14 has 8 protons and 7 neutrons; Nitrogen-15 has 7 protons and 7 neutrons

• Nitrogen-14 has 7 protons and 8 neutrons; Nitrogen-15 has 7 protons and 8 neutrons

How do you find the mass of a calcium atom?

• add the number of protons and neutrons

• add the number of protons and electrons

• add the number of neutrons and electrons

• add the number of protons, neutrons, and electrons

Which of the following was a limitation of the Bohr Model?

• He only theorized that atoms are the building block of matter.

• Failed to understand the charges of protons and electrons

• Did not explain the movement of electrons or the interaction between the subatomic particles.

• Did not know the existence of subatomic particles.

Which of the flowing statements is true regarding subatomic particles?

• protons and electrons are located inside the nucleus

• protons and neutrons are located inside the nucleus

• protons and electrons are located outside of the nucleus

• neutrons are located outside of the nucleus

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Calculation used to find the number of neutrons in an atom

• Atomic Mass - Atomic Number
• Atomic Number - Atomic Mass
• Atomic Mass - Electrons
• none of these

An atom has 10 protons and a mass of 18. It has __ neutrons

• 10
• 18
• 28
• 8

The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.

• 12.5
• 13
• 25
• 37