Atoms and the Periodic Table Review

What is the identity of the following model?

• Helium

• Beryllium

• Boron

• Carbon

Tags

NGSS.MS-PS1-1

Which student correctly identifies the charge of the subatomic particles?

• Kelly: Protons (neutral), Neutrons (positive), Electrons (negative)

• Alexis: Protons (negative), Neutrons (positive), Electrons (neutral)

• Diamond: Protons (positive), Neutrons (neutral), Electrons (negative)

• Anthony: Protons (neutral), Neutrons (negative), Electrons (positive)

The pictures below show the position of different elements on the periodic table. Which picture has an X in the locations of the three elements that would be most similar in the way they react and have the same number of valence electrons?

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Which of the following best describes an atom

• protons and electrons are grouped together in a random pattern

• protons and electrons are grouped together in an alternating pattern

• a core of protons and neutrons surrounded by electrons

• a core of electrons and neutrons surrounded by protons

Tags

NGSS.MS-PS1-1

Which of the following statements is true about the diagram?

• These elements are in the same period.

• These elements are in the same group.

• These elements share the same chemical properties.

• These elements are both metals.

A group of students made claims about what makes an element the most reactive. Which student is correct?

• Rocio: An element with the most neutrons is the most reactive.

• Tyler: An element with 7 electrons in the outer shell.

• Daniel: An element with the same number of protons and electrons.

• Glenda: An element with 8 valence electrons

Which of the following does NOT describe the elements in 8A?

• They are called the Noble Gases

• They have 8 valence electrons

• They have 8 energy levels

• They are chemically stable

In which region of the table would nonmetals be found?

• 1

• 2

• 3

• 4

An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom?

• 29

• 35

• 64

• 93

Based on this information, the unidentified element is best classified as which of the following?

• a metal in group (1A)

• a metal in group (3A)

• a nonmetal in period 3

• a metalloid in period 5