Atomic Structure

Which diagram correctly shows the charges of the particles in a neutral beryllium

atom?

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Tags

NGSS.MS-PS1-1

Lara is building a model of a carbon atom. She wants to use blue dots for positive

particles, red for negative particles, and purple dots for neutral particles. The diagram

shows the location on her model where she can place each particle.

She made a table of the particles that need to be included in the model, recording the

type and number of each particle, the color dot she will use on the model, and the

particle's location on the diagram. Which of the following most likely shows her data

table?

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Tags

NGSS.MS-PS1-1

The diagram shows a neutral atom of an element from the periodic table.

* Hint: the white in the nucleus are protons *

• a potassium isotope

• a beryllium isotope

• a fluorine isotope

• a boron isotope

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NGSS.MS-PS1-1

The diagram below shows an atom of an element from the periodic table.

* Hint: the white in the nucleus are protons *

This atom is mostly likely —

• flourine, which can react and bond with calcium.

• potassium, which can react and bond with chlorine.

• boron, which can react and bond with magnesium.

• beryllium, which can react and bond with oxygen.

Tags

NGSS.MS-PS1-1

Which model best represents an atom of lithium (Li)?

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NGSS.MS-PS1-1

There are large blank spaces in the second and third horizontal rows in the Periodic

Table. These spaces allow elements —

• that have not been discovered yet to fit in the table once they are discovered.

• with consecutive atomic numbers to remain in groups.

• that occur naturally as gases to remain to the left of metals in the table.

• with similar properties to remain in groups.

One of the scientists who created the first version of the periodic table of elements was Russian chemist Dmitri Mendeleev. He stated "the elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties." According to Mendeleev, the word "periodicity" refers to the way in which —

• groups of elements on the periodic table share certain chemical properties.

• elements on the periodic table are arranged in columns by abundance.

• elements on the periodic table vary only according to atomic mass.

• groups of elements periodically change their location in the table.

Helium rarely combines with other elements. Chemists have placed helium on the far right end of the periodic table to allow it to be in the same column as the —

• nonmetals.

• noble gases.

• metalloids.

• metals.

An electron has —

• a neutral charge

• a positive charge

• a negative charge

• an alternating charge

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NGSS.MS-PS2-3

A proton has —

• an alternating charge

• a negative charge

• a positive charge

• a neutral charge