Elements and Chemical Bonds

What is represented in each block of the periodic table?

• one molecule

• one element

• one ion

• one electron

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NGSS.MS-PS1-1

What is indicated by the number in each block of the periodic table?

• the number of valence electrons per neutral atom

• the total number of electrons per neutral atom

• the number of valence electrons per ion

• the total number of electrons per ion

From left to right, what is the order of sections on a periodic table?

• nonmetals, metalloids, and metals

• metals, nonmetals, and metalloids

• metalloids, metals, and nonmetals

• metals, metalloids, and nonmetals

What is a common property of nonmetals?

• shininess

• malleability

• poor conductors

• ductility

Which of the following is a pure substance that contains two or more elements?

• compound

• ion

• molecule

• solution

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NGSS.MS-PS1-1

What information does a chemical formula provide?

• A chemical formula provides the number of electrons in an element.

• A chemical formula provides the chemical makeup of a compound.

• A chemical formula provides the structure of an atom.

• A chemical formula provides the boiling point of a molecule.

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NGSS.MS-PS1-1

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Which of the following is a method of representing atoms and the electrons in their outer energy levels?

• electron dot diagram

• chemical symbol

• chemical formula

• chemical equation

How many valence electrons does an atom of carbon have?

• 0

• 2

• 4

• 6

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NGSS.MS-PS1-1

In the formula H₂O, what does the number 2 indicate?

• There are two atoms of hydrogen in this molecule.

• Each hydrogen atom loses two electrons to the oxygen atom.

• Each hydrogen atom gains two electrons from the oxygen atom.

• Two atoms each of hydrogen and oxygen are in this molecule.

Tags

NGSS.MS-PS1-1

Which of the following is formed between atoms when they share electrons?

• ionic bond

• salt

• covalent bond

• electrical bond

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NGSS.MS-PS1-1