Periodic Table Trends

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

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Front

How does the number of valence electrons affect reactivity?

Back

Elements with fewer valence electrons tend to be more reactive because they can easily lose or gain electrons to achieve a stable electron configuration.

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Front

Which element has the fewest valence electrons: beryllium (Be), sodium (Na), oxygen (O), or neon (Ne)?

Back

Sodium (Na) has 1 valence electron.

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Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

How does ionization energy change across a period in the periodic table?

Back

Ionization energy generally increases across a period from left to right due to increasing nuclear charge.

Front

Which element has a lower ionization energy than Scandium (Sc): Helium (He), Titanium (Ti), Calcium (Ca), or Magnesium (Mg)?

Back

Calcium (Ca) has a lower ionization energy than Scandium (Sc).

Front

What is electronegativity?

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.

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Which element has the greatest electronegativity: fluorine, chlorine, bromine, or iodine?

Back

Fluorine has the greatest electronegativity.

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Front

How many valence electrons does iodine have?

Back

Iodine has 7 valence electrons.

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Which element has 2 valence electrons: cesium (Cs), magnesium (Mg), boron (B), or argon (Ar)?

Back

Magnesium (Mg) has 2 valence electrons.

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