Determining Protons, Neutrons, and Electrons in Atoms

This video tutorial introduces the concept of atoms, the smallest particles of elements, and explains their structure, including protons, neutrons, and electrons. It covers the properties and charges of these subatomic particles and how they contribute to the atom's mass. The tutorial also explains isotopes, using examples like carbon, beryllium, boron, magnesium, and fluorine, to demonstrate how to calculate the number of protons, neutrons, and electrons, as well as the atomic mass and charge of an element. The video concludes with a summary of the key points discussed.

What is the smallest particle of an element that retains all the properties of that element?

• Proton

• Electron

• Atom

• Molecule

Which subatomic particle is the lightest and located outside the nucleus?

• Neutron

• Proton

• Photon

• Electron

What is the charge of a proton?

• Negative one

• Positive one

• Zero

• Positive two

How are isotopes of an element identified?

• By their mass number

• By their charge

• By their atomic number

• By their electron count

If the atomic number of carbon is 6 and its atomic mass is 12, how many neutrons does carbon-12 have?

• 18

• 0

• 12

• 6

What is the atomic number of beryllium?

• 9

• 6

• 4

• 2

For the isotope B-6, what is the number of neutrons?

• 6

• 1

• 5

• 0

What is the atomic mass number of magnesium-24?

• 48

• 12

• 24

• 36

How do you calculate the charge of an atom?

• Number of protons minus number of electrons

• Number of neutrons minus number of electrons

• Number of electrons minus number of protons

• Number of protons minus number of neutrons

If fluorine has an atomic number of 9 and a charge of -1, how many electrons does it have?

• 9

• 11

• 10

• 8