Atomic Structure and Ions

This video tutorial reviews the three major subatomic particles: protons, neutrons, and electrons. It explains their charges, contributions to atomic mass, and how they are represented in the periodic table. The tutorial also covers the concept of isotopes and ions, and provides examples of calculating atomic properties using the periodic table.

Which subatomic particle is positively charged?

• Photon

• Electron

• Neutron

• Proton

What did Rutherford discover about the atom?

• Electrons orbit in fixed paths

• Atoms have no charge

• Atoms are mostly empty space

• Atoms are solid spheres

What does the atomic number of an element represent?

• The number of electrons

• The number of protons

• The number of neutrons

• The total mass

How is an isotope formed?

• By changing the atomic number

• By changing the number of protons

• By changing the number of electrons

• By changing the number of neutrons

What happens when an atom loses an electron?

• It becomes an isotope

• It becomes a negatively charged ion

• It becomes a positively charged ion

• It becomes a neutral atom

What is the charge of an ion with more electrons than protons?

• Positive

• It depends on the element

• Negative

• Neutral

If an atom has 20 protons and 18 electrons, what is its charge?

• 2+

• 2-

• Neutral

• 1+

How do you calculate the mass number of an atom?

• Add the number of protons and electrons

• Add the number of neutrons and electrons

• Add the number of protons and neutrons

• Subtract the number of electrons from protons

What element has an atomic number of 11?

• Calcium

• Lithium

• Sodium

• Helium

What is the mass number of an atom with 11 protons and 12 neutrons?

• 11

• 23

• 12

• 22