Chemistry Common Quiz-7th

The electron configuration of an atom determines how the atom reacts with other atoms. Examine the periodic table and determine which of the following substances is least likely to react with another substance.

• Bromine (Br)

• Gold (Au)

• Neon (Ne)

• Sodium (Na)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements can be characterized as a metal?

• O

• F

• Mg

• B

The number of neutrons in a chlorine atom is –

• 11

• 18

• 23

• 34

All atoms are electrically neutral. Atoms become electrically charged when they-

• lose and gain electrons.

• gain and lose protons.

• have the same number of neutrons and protons.

• have a different number of neutrons and protons.

Group I (Alkali Metals) includes Lithium (Li), Sodium (Na), and Potassium (K). These elements have similar chemical properties because they have the same __

• numbers of protons and neutrons in the nucleus.

• numbers of protons and electrons in the nucleus.

• numbers of electrons in the outer energy level.

• numbers of neutrons in the outer energy level.

Which of the following is the most important factor in determining an element’s place in the periodic table?

• Number of protons

• Number of neutrons

• Atomic charge

• Atomic density

Which best represents how electrons are arranged in the energy levels of a carbon atom?

• First level = 1 electron, Second = 5 electrons

• First level = 2 electrons, Second = 4 electrons

• First level = 3 electrons, Second = 3 electrons

• First level = 4 electrons, Second = 3 electrons

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NGSS.MS-PS1-1

Silicon’s atomic number is 14. This means that silicon has -

• 14 protons in its nucleus.

• 14 atoms in every molecule.

• a boiling point of 14^OC

• an atomic radius of 14 micrometers

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NGSS.MS-PS1-1

Which of the following chemical formulas represent the reactants in this chemical equation?

CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ and H₂O

• O₂ and CO₂

• CH₄ and 2O₂

• CO₂ and 2H₂O

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NGSS.MS-PS1-2

The subscripts in this formula C₆H₁₂O₆ provide information about -

• The number of compounds

• The number of atoms per element

• The number of molecules

• The name of each element

Tags

NGSS.MS-PS1-1