What determines the atomic number of an element?
Look at the positively charged particles inside the nucleus.
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Test the building blocks of chemistry with 10 questions about atoms, elements, the periodic table, chemical bonds, pH, states of matter, and core laws. Answer all 10 before the 150-second timer ends.
Look at the positively charged particles inside the nucleus.
Its formula contains two different chemical elements joined together.
Compare it with the positive charge of a proton.
It sits between acidic and basic values on the common pH scale.
The symbol comes from the Latin name “natrium.”
This basic unit contains a nucleus surrounded by electrons.
Think of a bond formed by shared electron pairs.
They are also sometimes called families.
It can flow, but unlike a gas it does not normally expand to fill the entire container.
The atoms can rearrange into new substances, but the total mass remains the same.
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Reference note: Questions use standard introductory chemistry concepts covering atomic structure, elements, compounds, chemical bonding, pH, the periodic table, states of matter, and conservation of mass.
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