Investigations 1-2 I-Check: Chemical Interactions

Front

What is the difference between the substances represented by the symbols Co and CO?

Back

One is the symbol for an element, and one is a formula for a compound.

Front

Name the elements represented in H2O

Back

Hydrogen and Oxygen

Front

Name the elements represented in NaCl

Back

Sodium and Chlorine

Front

Name the elements represented in CO2

Back

Carbon and Oxygen

Front

What was Mendeleyev’s purpose for reorganizing the periodic table?

Back

He wanted to put elements with similar characteristics in the same column.

Front

Why are there millions of different substances despite only 90 naturally occurring elements on Earth?

Back

Elements can combine in many ways to form different compounds.

Front

What is a compound?

Back

A substance made of two or more elements.

Front

Which pair of elements is represented in the chemical formula KCl?

Back

Potassium and Chlorine