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 do valence electrons affect reactivity?

Back

The number of valence electrons determines how easily an element can lose or gain electrons, influencing its reactivity.

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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 atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

Which element has the greatest atomic radius: H, N, Cl, or Cs?

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Cesium (Cs) has the greatest atomic radius.

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What is electronegativity?

Back

Electronegativity is a measure of how well an atom can attract and hold onto electrons.

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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).

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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.

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Front

Which atom has the largest atomic radius: potassium, rubidium, francium, or cesium?

Back

Francium has the largest atomic radius.

Front

What trend does atomic radius follow in the periodic table?

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Atomic radius increases down a group and decreases across a period from left to right.