ASVAB General Science Matter Practice Test 909928

Questions 5
Focus Matter
Topics Acidity, Atom, Chemical Change, Neutron, Proton
Question Type Questions

Study Guide

Acidity

An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.

Atom

An atom is the smallest component of an element that still retains the properties of the element.

Chemical Change

During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).

Neutron

A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.

Proton

A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.