Building Blocks of Chemistry

What are atoms primarily composed of?

• Cells

• Energy

• Tiny particles

• Molecules

Tags

NGSS.MS-PS1-1

What orbits around the nucleus of an atom?

• Electrons

• Neutrons

• Ions

• Protons

What is the relative mass of protons and neutrons?

• 1/2000

• 1

• 2000

• 0

What charge do electrons carry?

• Positive

• Neutral

• No charge

• Negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

How is the size of an atom primarily determined?

• By the element it represents

• By its charge

• By its neutron count

• By its electron count

What makes an atom neutral?

• More electrons than protons

• Equal number of protons and electrons

• More protons than electrons

• Equal number of protons and neutrons

What is an ion?

• An atom with an unbalanced number of protons and electrons

• An atom with an extra neutron

• A molecule made of two atoms

• An atom with equal protons and electrons

What happens to an atom when it gains an electron?

• It becomes a positive ion

• It remains neutral

• It turns into a molecule

• It becomes a negative ion

What does the elemental symbol represent?

• The total mass of the atom

• The element's name in abbreviated form

• The number of neutrons

• The atom's charge

What does the atomic number tell us?

• Total mass of the atom

• Number of protons

• Number of neutrons

• Number of electrons