Elements and Compounds

The smallest building block of all matter is the ________.

A(n) _______ is a pure substance made up of just one kind of atoms.

A ___________ is a mixture of two or more elements.

The _____________ organizes all the elements and shows their symbols and atomic weights.

There are _______ elements on the current periodic table.

Water, salt, sugar, and other common items are __________. Options: elements, compounds, energy, tables

Carbon, oxygen, and hydrogen are all common _________.

The biosphere means ___________.

The hydrosphere is _____________.

Everything we know of in the universe is made up of combinations of the 118 known elements. True or False?