Atomic Structure

How many neutrons are in this calcium ion?

• none

• 2+

• 40

• 20

The mass of an electrons is:

• Greater than the mass of a neutron

• Less than the mass of a neutron

• Equal than the mass of a neutron

• Equal than the mass of a proton

Describe the location and charge of a neutron

• Nucleus and negative

• Nucleus and no charge

• Electron cloud and negative

• Electron cloud and no charge

Look at position Y in the diagram. What subatomic is located at Y?

• Neutron

• Proton

• Electron

• Nucleus

Using the provided image. What is the atomic number and number of protons for the element Mg?

• Atomic # = 12, Proton # = 12

• Atomic # = 24, Proton # = 12

• Atomic # = 12, Proton # = 36

• Atomic # = 24, Proton # = 24

An element has an Atomic # of 19 and an Atomic mass of 39. Determine how many neutrons this element has?

• 58

• 19

• 39

• 20

What two subatomic particles contribute to the mass of an atom?

• Protons and Electrons

• Protons and Neutrons

• Electrons and Neutrons

• Protons, Neutrons, and Electrons

Pick the answer that accurately describes the structure of an atom

• Electrons orbit a nucleus made of protons and neutrons

• Protons orbit a nucleus made of electrons and neutrons

• Neutrons and protons orbit a cloud of electrons

• Electrons and protons orbit a cloud of neutrons

How do you find the number of neutrons an atom has?

• atomic mass

• atomic mass plus atomic number

• atomic number

• atomic mass minus atomic number

The nucleus contains protons and neutrons. What is the charge of the nucleus?

• Positive

• Negative

• No charge

• Equal between positive and negative