Elements Answers

The model below shows a carbide ion.

One way in which elements differ from each other is the structure of the electron cloud in each element’s atoms. In an electron cloud, an electron that is farther away from the nucleus has

If we have a sample of silicon (Si) atoms that has 14 protons, 14 electrons, and 18 neutrons

Which describes an atom that has fewer neutrons than protons and more electrons than protons?

The model below shows a calcium atom.

All atoms of the element potassium have 19 protons. One of the most stable types of potassium atoms has the mass number 39.

Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained.

A potassium atom (atomic number 19) loses an electron while forming a bond with another atom.

Which are different forms of an element that have different numbers of neutrons?

What is the number at the end of an isotope’s name?