A metalloid

Which of the following elements makes up the largest percentage of the Earth's atmophere? (~78 %)

Which of the following elements makes up the majority of the Earth's Crust?

Which of the following is a compound?

Which of the following is an element?

Which of the following is a compound?

The elements in a compound

A _______________ is a combination of two or more substances that are not chemically combined.

A ________________ is a mixture that appears to be a single substance.

In solutions, the solute is the substance that is dissolved and the _____________ is the substance in which the solute is dissolved.

Concentration is

If two poisonous elements are combined chemically, which of the following will be true of the resulting compound?

Two different atoms are chemically combined to form a new substance. What kind of substance formed?

Which of the following is the symbol for Potassium?

What group of elements on the periodic table are unreactive?

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