Question

Answer the questions below for an ion with 74 protons, a charge of +2, and a mass number of 192.

How many neutrons are present?

How many electrons are present?

What is the element symbol?

Is this substance a metal or a nonmetal?

Answer 1

118

72

W

Metal

Step-by-step explanation:

When given the number of protons, also known as the atomic number, we can use a periodic table to find more information about an element.

Neutrons

Neutrons, along with protons, are larger subatomic particles found in the nucleus. Since protons and neutrons are so much heavier than electrons, the mass number only counts the number of protons and neutrons.

• The mass number is the number of protons plus neutrons.

This means that mass number - number of protons = number of neutrons. So we can create an equation to represent this.

• 192 - 74 = 118

Thus, there are 118 neutrons.

Electrons

The charge of an atom can tell the number of electrons. Most atoms have no charge because the number of electrons and protons is equal (the charges cancel out). However, in this case, there is a charge of +2.

Since electrons have a negative charge, electrons have to be removed for the overall atom to have a positive charge. Specifically, a charge of +2 means that 2 electrons have been removed.

• 74 - 2 = 72

There are 72 electrons.

Element Symbol

The atomic number is used to identify atoms. The element with 74 protons is tungsten. The symbol of tungsten is W.

Metal

Elements closer to the left of the periodic table are metals. Specific groups of the periodic tables are metals. This includes groups 3-12 which are known as transition metals. Tungsten is in group 6 and thus a metal.