Atoms EOC Quiz

Which of the following subatomic particles has a positive charge?

• Proton
• Neutron
• Electron
• Nucleus

What is the atomic number of an atom that contains 11 protons and 12 neutrons?

• 12
• 11
• 23
• 22

Tags

NGSS.MS-PS1-1

Which of the following statements about isotopes is true?

• Isotopes have different numbers of protons.
• Isotopes have different numbers of electrons.
• Isotopes have the same mass number.
• Isotopes have the same atomic number.

Which of the following best describes the arrangement of particles in the nucleus of an atom?

• Protons and electrons are tightly packed together.
• Protons and neutrons are tightly packed together.
• Electrons move rapidly around the nucleus.
• Electrons occupy most of the volume of the nucleus.

How many valence electrons does an atom of chlorine (Cl) have?

• 7
• 8
• 17
• 18

Which of the following statements best describes an element?

• An element is a substance made up of two or more different types of atoms chemically bonded together.
• An element is a substance that cannot be broken down into simpler substances by chemical means.
• An element is a substance that can change its state of matter at room temperature.
• An element is a substance that has a specific shape and volume.

What happens to the number of protons and electrons when an atom gains an electron?

• The number of protons decreases, and the number of electrons increases.
• The number of protons increases, and the number of electrons decreases.
• The number of protons stays the same, and the number of electrons increases.
• The number of protons stays the same, and the number of electrons decreases.

Which of the following statements is true about the periodic table?

• Elements in the same period have similar properties.
• Elements in the same group have the same number of valence electrons.
• Elements in the same group have the same atomic number.
• Elements in the same period have the same number of energy levels.

What is the chemical symbol for the element with atomic number 8?

• C
• O
• H
• N

What determines the chemical properties of an atom?

• The number of neutrons in the nucleus
• The number of protons in the nucleus
• The number of electrons in the nucleus
• The number of energy levels in the nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2