Unit 2.0 Atoms and Isotopes(flash card)

Front

Which shows the correct parts of the nucleus?

Back

Neutron and Proton

Answer explanation

The nucleus of an atom contains protons and neutrons. Electrons are found in the electron cloud surrounding the nucleus, not inside it. Therefore, the correct answer is 'Neutron and Proton'.

Front

Which part of an atom has the smallest mass?

Back

Electron

Answer explanation

The electron has the smallest mass among the three subatomic particles. Protons and neutrons have significantly greater masses, making the electron the lightest component of an atom.

Front

Which part of an atom has a positive charge?

Back

Proton

Answer explanation

The proton is the part of an atom that carries a positive charge. Neutrons have no charge, and electrons carry a negative charge. Therefore, the correct answer is proton.

Front

Which part of an atom has a negative charge?

Back

Electron

Answer explanation

The electron is the part of an atom that carries a negative charge. Protons have a positive charge, and neutrons are neutral, meaning they have no charge.

Front

Which part of an atom has no charge?

Back

Neutron

Answer explanation

The neutron is the part of an atom that has no charge, making it neutral. Protons have a positive charge, and electrons have a negative charge, so the correct answer is the neutron.

Front

Using the picture from a periodic table, what is the Atomic Number?

Back

26

Answer explanation

The Atomic Number represents the number of protons in an element. For iron (Fe), this number is 26, making it the correct choice. The other options represent the element symbol (Fe) and its atomic mass (55.845, 56).

Front

Using the picture from a periodic table, what is the Atomic Mass?

Back

55.845

Answer explanation

The atomic mass of an element is a weighted average of its isotopes. For iron (Fe), this value is approximately 55.845, making it the correct choice among the options provided.

Front

Using the picture from a periodic table, what is the Mass Number?

Back

The mass number is not on the periodic table

Answer explanation

The mass number, which is the total number of protons and neutrons in an atom, is not explicitly listed on the periodic table. Instead, the table provides the atomic mass, which is a weighted average of isotopes.

Front

How many protons are in Iron?

Back

26

Answer explanation

Iron has an atomic number of 26, which indicates the number of protons in its nucleus. Therefore, the correct answer is 26.

Front

When two atoms of the same element have different masses, they are called ______, and have a different number of ______.

Back

Isotopes; Neutrons

Answer explanation

When two atoms of the same element have different masses, they are called isotopes. This occurs because they have a different number of neutrons, which affects their mass but not their chemical properties.