Review Quiz #01

Which atom has the greatest nuclear charge?

• Si

• Ar

• Al

• Na

An atom has 10 protons, 11 neutrons and 10 electrons. What is the electron configuration for this atom?

• 2-8-18-3

• 2-8

• 2-8-1

• 1-9-1

A sample of a potassium-containing compound is heated in the flame of a bunsen burner until the atoms are in the excited state. The color of the flame appears pink. What is a possible electron configuration of the potassium in the excited state?

• 2-8-6-5

• 2-8-7-2

• 1-9-8-1

• 2-8-8-1

How do the chemical properties of the Na atom and the Na+ ion compare?

• They are different because each has a different electron configuration.

• They are different because each has a different atomic number.

• They are the same because each has the same atomic number.

• They are the same because each has the same electron configuration.

An atom has 10 protons, 11 neutrons and 10 electrons. What is the atomic number of this atom?

• 10

• 11

• 12

• 21

A sample of a potassium-containing compound is heated in the flame of a bunsen burner until the atoms are in the excited state. The color of the flame appears pink. When the potassium atoms become excited, was energy absorbed or released?

• energy was released as the electrons moved further from the nucleus

• energy was released as the electrons moved closer to the nucleus

• energy was absorbed as they moved further from the nucleus

• energy was absorbed as the electrons moved closer to the nucleus

An atom has 10 protons, 11 neutrons and 10 electrons. What is the mass number for this atom?

• 10

• 11

• 20

• 21

An atom has 10 protons, 11 neutrons and 10 electrons. Identify this atom.

• scandium

• gallium

• neon

• sodium

In an experiment, alpha particles were used to bombard gold foil. As a result of this experiment, the conclusion was made that the nucleus of an atom is

• larger than the atom and negatively charged

• smaller than the atom and negatively charged

• smaller than the atom and positively charged

• larger than the atom and positively charged

The Al+ ion has the same electron configuration as which noble gas?

• Kr

• Ar

• Ne

• He