Atomic Structure and Properties

The video tutorial provides an overview of the periodic table, explaining the significance of atomic numbers and mass. It guides viewers on how to read and interpret the information on periodic table blocks, using examples of elements like zinc, lithium, and silicon. The tutorial also covers the concepts of isotopes and ions, explaining how changes in protons, neutrons, and electrons affect atomic identity and mass.

What does it mean for an atom to be electrically neutral?

• It has more protons than electrons.

• It has more electrons than protons.

• It has an equal number of protons and electrons.

• It has no protons or electrons.

What does the atomic number of an element represent?

• The number of electrons in the outer shell.

• The number of protons in the nucleus.

• The total mass of the atom.

• The number of neutrons in the nucleus.

Why is the atomic mass often a decimal number?

• It is the mass of the most common isotope.

• It is a random number assigned to each element.

• It represents the average mass of all isotopes of the element.

• It includes the mass of electrons.

How do you calculate the number of neutrons in an atom?

• Add the atomic number to the atomic mass.

• Subtract the atomic number from the atomic mass.

• Multiply the atomic number by the atomic mass.

• Divide the atomic mass by the atomic number.

What is the atomic number of oxygen?

• 6

• 8

• 16

• 18

What changes occur in an atom to form an isotope?

• The atomic number changes.

• The number of protons changes.

• The number of neutrons changes.

• The number of electrons changes.

What is an ion?

• An atom with a different number of electrons.

• An atom with a different number of neutrons.

• An atom with a different number of protons.

• An atom with a different atomic mass.

If an atom has 3 protons and 4 neutrons, what is its atomic mass?

• 7.5

• 7

• 4

• 3

What happens to an atom if it loses an electron?

• It becomes a positively charged ion.

• It becomes an isotope.

• It becomes a different element.

• It becomes a negatively charged ion.

What is the symbol for zinc on the periodic table?

• Zn

• Zc

• Z

• Zn2