1 Atomic Structure

Which of the following shows the correct charges of subatomic particles?

• protons -, electrons +, neutrons 0

• protons +, electrons 0, neutrons -

• protons +, electrons -, neutrons 0

• protons -, electrons 0, neutrons -

Which subatomic particles are located in the nucleus?

• electrons

• protons

• neutrons

• DNA

Choose the correct matching of subatomic particles for the isotope: Beryllium-10.

• 4 protons, 4 electrons, and 6 neutrons

• 4 protons, 4 electrons, and 10 neutrons

• 9 protons, 5 electrons, and 5 neutrons

• 10 protons, 10 electrons, and 10 neutrons

• 32 protons, 17 electrons, 17 neutrons

• 15 protons, 15 electrons, 15 neutrons

• 15 protons, 15 electrons, 32 neutrons

• 15 protons, 15 electrons, 17 neutrons

A sample of gallium contains 80% of Ga-69 and 20% atoms of Ga-71. What is the average atomic mass of this sample of gallium?

• 69.7 amu

• 69.4 amu

• 70.6 amu

• 5534 amu

Copper has two stable isotopes, Cu-63 and Cu-65. The average atomic mass of copper is 63.546 amu. Which of the following statements is true?

• A sample of copper will contain more atoms of Cu-65 than Cu-63

• A sample of copper will contain more atoms of Cu-63 than Cu-65

• A sample of copper will contain an equal number of atoms of Cu-63 and Cu-65

• Not enough information is given in the question

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4

Isotopes of the same element have the same number of _________ and different number of _________.

• Protons, neutrons
• protons, electrons

• electrons, neutrons

• neutrons, protons