Chemistry Unit 1

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

• molecule

• cell

• compound

• atom

Tags

NGSS.MS-PS1-1

What is an atom composed of?

• protons, neutrons, and positrons

• protons, electrons, and photons

• neutrons, electrons, and photons

• protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

What is an ion?

• An ion is a type of chemical bond.

• An ion is a form of radiation.

• An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a positive or negative charge.

• An ion is a type of subatomic particle.

Tags

NGSS.MS-PS1-5

How does an ion differ from an atom?

• An ion has a larger atomic mass than an atom.

• An ion has a different number of protons than an atom.

• An ion has a different number of neutrons than an atom.

• An ion has a net electrical charge, while an atom is electrically neutral.

What is a photon?

• A photon is a type of subatomic particle.

• A photon is a unit of energy.

• A photon is a form of electromagnetic radiation.

• A photon is a fundamental particle of light.

Tags

NGSS.HS-PS4-3

What is the relationship between photons and light?

• Photons are a type of electromagnetic wave.

• Photons are the byproduct of light.

• Photons are the source of heat in light.

• Photons are the fundamental particles of light.

Tags

NGSS.HS-PS4-3

What is an isotope?

• A variant of an element with the same number of protons but a different number of neutrons.

• A variant of an element with the same number of electrons but a different number of protons.

• A variant of an element with the same number of neutrons but a different number of protons.

• A variant of an element with the same number of protons but a different number of electrons.

Tags

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How do isotopes of an element differ?

• Number of protons

• Number of neutrons

• Atomic mass

• Number of electrons

What is the atomic number of an element?

• The atomic number of an element is the number of protons in the nucleus of an atom.

• The atomic number of an element is the number of protons and neutrons in the nucleus of an atom.

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

What is the mass number of an element?

• The number of neutrons in an element.

• The number of protons in an element.

• Correct answer for the question

• The atomic number of an element.