Atomic Structure, and Elements

What are the fundamental building blocks of all matter?

• Atoms

• Molecules

• Elements

• Compounds

Which four elements constitute about 96% of the human body?

• Oxygen, Carbon, Hydrogen, Nitrogen

• Oxygen, Carbon, Calcium, Phosphorus

• Hydrogen, Helium, Lithium, Beryllium

• Carbon, Nitrogen, Oxygen, Sulfur

What is the smallest unit of an element that retains all the chemical properties of that element?

• Atom

• Molecule

• Proton

• Electron

What determines the identity of an element?

• Number of protons

• Number of neutrons

• Number of electrons

• Mass of the atom

What keeps an atom intact?

• Attraction between protons and electrons

• Repulsion between electrons

• Attraction between neutrons and electrons

• Repulsion between protons