Atoms, Elements, and Compounds

Front

What is a compound? Options: an atom with more electrons than protons, a substance in which the atoms of two or more elements are combined together, an atom with more neutrons than protons, a substance in which the atoms of three or more elements are combined together

Back

a substance in which the atoms of two or more elements are combined together

Front

The chemical combination of two or more different kinds of atoms in fixed amounts is called a(n)

Back

compound

Front

Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?

Back

compound

Front

Where are protons and neutrons located? Options: in the nucleus, in the electron cloud, in the valence shell

Back

in the nucleus

Front

What is the charge on a proton?

Back

positive

Front

What is the charge of an electron?

Back

negative

Front

A pure substance that is made from one type of atom is a(n) ______________ .

Back

Element

Front

What is the role of an electron in an atom?

Back

Electrons circle the nucleus and have a negative charge.

Front

In an atom, what is the number of protons equal to?

Back

The number of electrons

Front

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

Back

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