What is the charge of a proton?

• Negative

• Positive

• Neutral

• Variable

Which subatomic particle is not found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• All of the above are found in the nucleus

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom

The mass number of an atom is determined by the sum of which subatomic particles?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Electrons only

What is an isotope?

• Atoms of the same element with the same number of protons but a different number of neutrons

• Atoms of different elements with the same number of neutrons

• Atoms with the same number of protons and electrons

• Charged atoms

An ion is formed when an atom gains or loses which subatomic particle?

• Proton

• Neutron

• Electron

• Both proton and neutron

What is the charge of an ion called when it loses one or more electrons?

• Negative

• Positive

• Neutral

• Variable

How can you determine the number of neutrons in an atom if you know its atomic number and mass number?

• Subtract the atomic number from the mass number

• Add the atomic number to the mass number

• Multiply the atomic number by the mass number

• Divide the mass number by the atomic number

Which of the following is true about isotopes?

• They have different atomic numbers but the same mass number

• They have the same atomic number but different mass numbers

• They have different numbers of electrons but the same number of protons

• They are always ions

What is the significance of the atomic number in determining the chemical properties of an element?

• It determines the element's position on the periodic table

• It indicates the number of electrons in a neutral atom, which determines how the atom will react chemically

• It shows the total mass of the atom

• It is only important for isotopes

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