Elements - Assignment

*An element is made up of _________.* one type of atom two types of atoms more than two types of atoms

One type of atom

*When electrons are lost, a ______ ion is formed.* positive negative neutral *When electrons are gained, a ______ ion is formed.* positive negative neutral

Positive Negative

*An isotope has the same number of ________ but a different number of _______ than other atoms of the same element.* electrons protons neutrons

Protons Neutrons

*An electron in the first energy level of the electron cloud has _______ as an electron in the third energy level.* a lower energy than a higher energy than the same energy

A lower energy than

*An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope?* fluorine-___

19

*The element copper has 29 protons. What is the atomic number of copper?*

29

*What is the name of the aluminum ion?* Al-1 Al+2 Al-3 Al+3

Al+3

*When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a(n) _________.* element compound isotope ion

Compound

*The aluminum atom ______ electrons to form an ion.* gains loses neither gains nor loses *The ion that is formed is* positive negative neither positive nor negative

Loses Positive

*Which statement accurately describes the chemical symbol of an element?* The chemical symbol is always a single letter. The chemical symbol always starts with the same letter as the name of the element. The chemical symbol always begins with a capital letter. The chemical symbol can be shared by more than one element.

The chemical symbol always begins with a capital letter.