Front

What is the ATOMIC WEIGHT of an element?

Back

The atomic weight is the average mass of an element's atoms, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus.

Front

What is the ATOMIC NUMBER of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

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What does the symbol 'Na' represent?

Back

'Na' is the chemical symbol for Sodium, an element with atomic number 11.

Tags

NGSS.HS-PS1-1

Front

What does the symbol 'Ca' represent?

Back

'Ca' is the chemical symbol for Calcium, an element with atomic number 20.

Tags

NGSS.HS-PS1-1

Front

What is the chemical symbol for Copper?

Back

The chemical symbol for Copper is 'Cu', and its atomic number is 29.

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What is the chemical symbol for Gallium?

Back

The chemical symbol for Gallium is 'Ga', and its atomic number is 31.

Front

How is the atomic weight of an element calculated?

Back

The atomic weight is calculated based on the relative abundance of isotopes and their masses.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Tags

NGSS.HS-PS1-8

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Tags

NGSS.HS-PS1-1

Front

What are metals, nonmetals, and metalloids?

Back

Metals are good conductors of heat and electricity, nonmetals are poor conductors, and metalloids have properties of both.