Nuclear physics

Atomic number=

• number of neutrons
• atomic mass
• protons
• electrons+protons

Mass Number is--

• the number of protons + neutrons
• the number of protons
• the number of electrons +protons +electrons
• the same as atomic number

How many protons does He have?

• 4
• 2
• 6
• 0

The top number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

The bottom number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

Isotopes are

• Positively charged particles that are located in the nucleus of atoms and have mass

• the smallest particle of an element that keep their properties of the element

• Atoms of the same element with a different number of neutrons.

• Negatively charged particles that are located in orbitals that surround the nucleus of an atom and have no mass.

The arrows in this diagrams depict...

• Emission of light energy

• Absorption of light energy

• Absorption and Emission of light energy

• Neither absorptions and emission of light energy

The arrows in this energy diagram depict...

• Absorption of light energy because the arrows are pointed up.

• Emission of light energy because the arrows are pointed up.

• Absorption of light energy because the arrows are pointed down

• Emission of light energy because the arrows are pointed down

Which are absorption arrows?

• a, b, c, d

• e, f, g, h

• a, e, b

• d, c, h

Which arrow indicates absorption of the LONGEST WAVELENGTH? (hint: how do energy and wavelength relate?)

• h

• e

• a

• d