Unit 2 Test

The electrically neutral subatomic particle found in the nucleus. What is it?

• Voltron

• Neutron

Which type of particles are found in a cloud outside of the nucleus?

• positively and negatively charged particles

• negatively charged particles

There are three main types of subatomic particles in an atom. Which of these particles balance the charge of the atom?

• protons and electrons

• protons and neutrons

Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom to the right?

• It has mass but no charge

• It has no mass and a positive charge.

According to the periodic table, which of the following best represents a carbon atom?

• A

• B

Use the periodic table to determine the number of electrons in a neutral Boron atom.

• 3

• 5

Which of the following best describes an electron?

• It has no charge and about the same mass as a proton.

• It has a negative charge and much less mass than a proton.

The diagram to the right shows the electrons in a neutral atom. The electrons are arranged according to energy level. Analyze this diagram and determine which statement is false.

• This atom has an atomic mass of 23.

• This atom has 11 valence electrons.

Which element has one more proton than Magnesium (Mg)?

• Aluminum

• Sodium

Which element has properties similar to Chlorine, atomic number 17?

• Flourine

• Sodium