Unit 4 LO#1-2 Flashcard

Front

What element is in Group 2, Period 3?

Back

Magnesium is the element in Group 2, Period 3.

Front

How many valence electrons does Helium have?

Back

Helium has 2 valence electrons.

Front

What period contains the element uranium?

Back

Uranium is found in Period 7 of the periodic table.

Front

How many valence electrons does a carbon atom have?

Back

A carbon atom has 4 valence electrons.

Front

Why are halogens so reactive?

Back

Halogens are reactive because they only need one more valence electron to achieve a full outer shell.

Front

What is the atomic number of Magnesium?

Back

The atomic number of Magnesium is 12.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

Front

Which group contains the noble gases?

Back

Group 18 contains the noble gases.

Front

What is the general trend of reactivity in Group 1 elements?

Back

Reactivity increases as you move down Group 1 elements.

Front

What is the electron configuration of Carbon?

Back

The electron configuration of Carbon is 1s² 2s² 2p².