1.1 Relative atomic mass

calculate the relative atomic mass for Ammonium nitrate

• 80.0

• 79

• 60

• 65

The relative atomic mass is the average mass of an atom compared to 

• the mass of a carbon-12 atom.
• 1/12 the mass of a carbon-12 atom
• the mass of a hydrogen atom
• 1/12 the mass of a hydrogen atom

What is the relative atomic mass of sodium?

• 11
• 23
• 46
• 64

What is the unit of relative molecular mass?

• kilogram
• gram
• gram per mole (g/mol)
• no units

Each element is defined by the number of

• Atoms

• Isotopes

• Neutrons

• Protons

• Nuclei.

Tags

NGSS.HS-PS1-8

A/an _______ has a positive charge and mass.

• Neutron

• Electron

• Proton

• Isotope

• Nucleus

The atomic mass number of a specific element is determined by the:

• number of protons in its nucleus

• number of neutrons plus protons in its nucleus

• number of neutrons plus electrons in its nucleus

• number of electrons in its outermost shell

• total number of neutrons orbiting the nucleus

An atom that loses or gains electrons is called a/an

• isotope.

• proton.

• neutrino.

• neutron.

• ion.

The smallest unit of matter that retains the characteristics of an element is an:

• Ion

• isotope

• atom

• electron

The atomic mass of an element is the ___.

• average of the mass number and the atomic number for the element

• weighted average of the masses of the isotopes of the element

• total mass of the isotopes of the element

• total number of subatomic particles in the nucleus