Elements Answers

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

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.

Scientists are working with a liquid that is made of only one type of atom. Which statement correctly describes this liquid?

The model below shows a carbide ion.

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

The chemical symbol for the element calcium is Ca. What would be the symbol representing calcium atoms that have lost two electrons?

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