Copy of Practice Quiz - Unit 1 - Intro to Atoms (5/28/2026)

A) The smallest unit of chemical compounds

B) The basic building blocks of matter

C) Large molecules that make up cells

D) The components of protons and neutrons

A) Neutron

B) Proton

C) Electron

D) Isotope

A) Inside the nucleus

B) In a cloud around the nucleus

C) In the nucleus with protons

D) In fixed orbits only

A) The total mass of the atom

B) The number of neutrons in the nucleus

C) The number of protons in the nucleus

D) The number of electrons in the atom

A) Protons + Electrons

B) Protons + Neutrons

C) Neutrons - Protons

D) Electrons + Neutrons

A) More neutrons than protons

B) Equal number of protons and electrons

C) More electrons than protons

D) A charged ion

A) A positively charged ion

B) A neutral atom

C) A negatively charged ion

D) A molecule with no charge

A) An atom with equal protons and electrons

B) A negatively charged ion

C) A positively charged ion

D) An atom with no charge

A) Element Name

B) Atomic Mass

C) Atomic Number

D) Symbol

A) oo for Oxygen

B) O for oxygen

C) o for Oxygen

D) O2 for oxygen

A) The number of protons only

B) The average mass of an atom's isotopes

C) The number of electrons only

D) The mass of the nucleus only

A) The atomic mass of the element

B) The number of protons

C) The energy levels of electrons

D) The chemical properties of the elements

A) Horizontal rows of elements

B) Vertical columns of elements

C) The mass of isotopes

D) The atomic charge of elements

A) 11

B) 23

C) 12

D) 10

A) Protons - Neutrons

B) Neutrons - Electrons

C) Protons - Electrons

D) Electrons - Neutrons

A) It has only one isotope

B) It is an average of all isotopes

C) It represents the number of electrons

D) It is a calculation error

A) By directly observing atoms

B) Through theoretical calculations

C) Based on experimental evidence

D) By using advanced technology

A) To entertain scientists

B) To visualize and explain phenomena

C) To replace experimental data

D) To predict future discoveries

A) 1 meter

B) 1 nanometer

C) 1 picometer

D) 1 millimeter

A) Thousands

B) Millions

C) Trillions

D) Billions

A) Electrons only

B) Protons and electrons

C) Protons and neutrons

D) Neutrons only

A) Positive

B) Negative

C) Neutral

D) Variable

A) Gravitational force

B) Electromagnetic force

C) Nuclear force

D) Friction

A) Electrons and neutrons

B) Protons and neutrons

C) Electrons only

D) Protons only

A) -1

B) 0

C) +1

D) Variable

A) It is larger than the atom

B) It is about the same size as the atom

C) It is a fraction of the size of the atom

D) It is immeasurable

A) Electromagnetic force

B) Strong nuclear force

C) Gravitational force

D) Weak nuclear force

A) Heavier

B) Equal

C) Lighter

D) Variable

A) +1

B) 0

C) -1

D) +2

A) The mass number

B) The atomic number

C) A unique element

D) The number of neutrons

A) The mass of the atom

B) The chemical reactivity

C) The identity of the element

D) The number of isotopes

A) Protons + Electrons

B) Protons - Neutrons

C) Protons + Neutrons

D) Neutrons - Electrons

A) Atoms with different numbers of protons

B) Atoms with different numbers of electrons

C) Atoms with the same number of protons but different neutrons

D) Atoms with equal numbers of protons and neutrons

A) P

B) K

C) Po

D) Pt

A) Total number of protons only

B) Total number of neutrons only

C) Total number of protons and neutrons

D) Total number of electrons only

A) Positive

B) Negative

C) Neutral (zero)

D) Variable

A) Always round up

B) Round based on the decimal

C) Ignore the decimal

D) Use a calculator

A) 12

B) 24

C) 6

D) 0

A) The mass of the atom

B) The imbalance of protons and electrons

C) The number of neutrons

D) The energy levels of electrons

A) To provide a positive charge

B) To balance the charge of protons

C) To hold protons together

D) To determine chemical properties

A) Weak nuclear force

B) Gravitational force

C) Electromagnetic force

D) Strong nuclear force

A) To determine the mass

B) To define the element

C) To participate in chemical bonding

D) To form the nucleus

A) 8

B) 16

C) 0

D) 4

A) Atomic number = Protons + Neutrons

B) Atomic number = Protons

C) Atomic number = Electrons

D) Atomic number = Neutrons

A) To list all known compounds

B) To organize elements based on properties

C) To provide historical context

D) To show atomic sizes

A) As a whole number

B) As a decimal number

C) In grams

D) In kilograms

A) It becomes positive

B) It becomes neutral

C) It becomes negative

D) It becomes zero

A) Protons

B) Neutrons

C) Electrons

D) Isotopes

A) 2

B) 6

C) 8

D) 4

A) They have the same number of protons but different electrons.

B) They have different mass numbers but the same atomic number.

C) They are always radioactive.

D) They have different atomic numbers.