Periodic Table Trends and Chemical Reactions

The number of electrons increases as you move _____ across a period

• Right to Left

• Left to Right

• Top to Bottom

• Bottom to Top

How many bonds can a carbon atom form?

When a chemical reaction happens between Sodium and Chlorine, it produces an exothermic reaction.

• True
• False

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NGSS.HS-PS1-4

Which of the following trends about the periodic table are true?

• Alkali metals readily lose their single valence electron

• Alkali metals easily gain a single valence electron

• Halogens easily gain a single valence electron

• Halogens readily lose their single valence electron

What is electronegativity?

• The energy change that occurs when an electron is added to a neutral atom in the gaseous state to form a negative ion

• A measure of energy output in an atom

• A measure of the tendency of an atom in a chemical compound to attract a shared pair of electrons towards itself within a chemical bond

• A measure of electricity in an atom

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NGSS.HS-PS1-1

Most atoms have ______ affinities because the process is typically exothermic (releasing energy)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Metallic character refers to the level of reactivity of a metal.

• True
• False

What two periodic trends are true?

• Ionization energy increases as you move left to right through a period

• Atomic radius increases as you move bottom to top through a group

• Electron affinity decreases as you move right to left through a period

• Electron affinity increases and you move bottom to top through a group

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following periodic trends are false?

• Atomic radius decreases as you move top to bottom through a group

• Metallic character increases as you move right to left through a period

• Atomic radius increases as you move right to left through a period

• Ionization energy increases as you move bottom to top through a group

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Carbon (C) reacts with oxygen (O₂) through a _____ reaction to form either carbon monoxide (CO) or carbon dioxide (CO₂), depending on the amount of oxygen available.