Chemistry Test 2022

Which element is the second most abundant in Earth's crust?

• Oxygen

• Calcium

• Sodium

• Silicon

Which of the following is the most abundant element in Earth’s crust?

• Calcium
• Iron
• Oxygen
• Potassium

All of the following elements are major components of living things on Earth EXCEPT -

• nitrogen
• carbon
• sulfur
• oxygen

What subatomic particle has a positive charge?

• Proton

• Electron

• Neutron

• Isotope

A small, dense region composed of protons and neutrons at the center of an atom.

• Electron

• Isotope

• Nucleus

• Orbital

Which of the following is responsible for the mass of an atom?

• Neutrons and electrons

• Protons and neutrons

• Protons only

• Neutrons only

A subatomic particle with a negative charge.

• Protons

• Neutrons

• Electrons

• Isotope

The atomic _____ tells you how many protons are in an atom.

• size

• mass

• weight

• number

A negatively charged particle, located in the outermost shell of an atom.

• Valence electron

• Muon

• Neutrino

• Lepton

which subatomic particles have no charge (they are neutral)?

• protons

• neutrons

• electrons