WIN 12/2 & 12/3

Front

What is the chemical formula for 1 atom of Nickel and 2 atoms of Fluorine?

Back

NiF₂

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of the element.

Front

How many atoms of Calcium are present in the formula H₃O₅CaCl₇?

Back

1

Front

What is the coefficient in the expression 3BeH₅Si₈?

Back

3

Front

Is CaSO₄ an element or a compound?

Back

Compound

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.

Front

What does the symbol 'Ni' represent in chemistry?

Back

Nickel, a chemical element.

Front

What is the purpose of coefficients in chemical equations?

Back

To indicate the number of molecules or moles of a substance.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

Front

What does the subscript '2' in H₂O represent?

Back

It indicates there are 2 hydrogen atoms in one molecule of water.