Science Exam 9th Grade

It is a pure substance that consists of only one type of atom.

It is a pure substance in which atoms of two or more different chemical elements are bonded in some fixed ratio.

• Element

• Compound

• Crystal Lattice

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NGSS.MS-PS1-1

Some elements that consist in two atoms are known as

• Binary

• Diatomic

• Pairs

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NGSS.MS-PS1-1

It is a cluster of atoms that stick together in a specific way.

• Crytal Lattice

• Elements

• Molecules

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NGSS.MS-PS1-1

The forces that hold atoms together are called.

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NGSS.HS-PS1-4

TRUE OR FALSE

Compounds are not the result of chemical reactions.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The version of the periodic table we use today was proposed by

• Dmitri Mendeleev

• Louis Pasteur

• Antonie van Leeuwenhoek

They are found on the right side of the periodic table.

• Metals

• Semi Metals

• Non Metals

An element in the periodic table can be identified in these three different ways:

• Atomic number, chemical symbol, element name

• Atomic number, element name, electron configuration

• Atomic weight, Atomic mass, Atomic number

TRUE OR FALSE

The chemical formula of a compound is the same for all the molecules of that compound.

Tags

NGSS.MS-PS1-1