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The fact that matter is not created or destroyed in any chemical or physical change is
The electrons in the outermost energy level of an atom are
The "salt-producing" family of nonmetals are known as
The horizontal rows in the Periodic Table are known as
What name is given to the elements in Groups 3 through 12?
The box in Group 18 in the fourth period, predict the state of matter of the element that belongs in that box.
The elements that do not, normally, form compounds are
In the periodic table, the most reactive metals are found
Which group of elements shares characteristics with both metals and nonmetals?
What is the most abundant element in the universe?
How many electrons are in its valence shell of hydrogen?
What metals have two electrons in their valence shell?
The ability of metals to reflect light is referred to as
Elements that lie along the stair-step line of the periodic table are
Hydrogen is grouped with the alkali metals because it
In chemical formulas, the number of atoms in a unit of the compound is shown by numbers called
How many hydrogen atoms are present in one molecule of ammonium acetate, NH4C2H3O2?
How many atoms are in CF2Cl2?
A group of chemical symbols and numbers that represent the elements and the numbers of atoms of each element in a compound is
The substances listed on the left side of a chemical equation are the
In a chemical equation, what tells you how many molecules of a reactant or product take part in a reaction?
An oxygen atom is bonded to another oxygen atom. This makes a:
Which number(s) represent compounds?
Place in the appropriate column it represents.
