Properties of elements flashcard

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.

Front

Which group of the periodic table has the most valence electrons?

Back

Group 18 (Noble gases) has the most valence electrons, which is 8, except for Helium which has 2.

Front

Why are elements in group 17 reactive?

Back

Elements in group 17 are reactive because they need one more electron to fill their outer shell.

Front

What is the electron configuration of elements in group 1?

Back

Elements in group 1 have one electron in their outer shell.

Front

What happens to the number of valence electrons across a period in the periodic table?

Back

The number of valence electrons increases from left to right across each period.

Front

What is true about elements with 7 electrons in their outer shell?

Back

They are reactive because they want to gain an electron to fill their outer shell.

Front

How many valence electrons do elements in group 2 have?

Back

Elements in group 2 have two valence electrons.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is the outer shell electron configuration of noble gases?

Back

Noble gases have a full outer shell, typically with 8 electrons.

Front

What is the trend of reactivity in group 1 elements?

Back

Reactivity increases as you move down group 1 in the periodic table.