Science - Ch. 12 - Section 1 General Questions

Atoms of element in Groups ______ and ______ on the Periodic Table have the same number of valence electrons as their group number.

1 2

Atoms of elements in Groups ____ through ______ have 10 fewer valence electrons than their group number. However, ____________ atoms have only 2 valence electrons.

13 18 Helium

Atoms of group _______ in the periodic table rarely form chemical bonds.

18

The first energy level is closest to the nucleus and can hold up to ______ electrons.

2

Atoms of elements in Groups ________ through _______ on the Periodic Table do not have a rule relating their valence electrons to their group number.

3 12

Electrons will begin filling the second energy level only after the first level is full. The second energy level can hold up to _____ electrons.

8

The third energy level can hold up to _____ electrons.

8

The outermost energy level of an atom is considered to be full if the energy level contains _____ electrons. However, the maximum electrons for the first energy level is _____ electrons.

8 2

(All/Not all) of the electrons in an atom make chemical bonds.

Not all

True/False. All substances are made of atoms of one or more of the approximately 100 elements.

True

True/False. The first energy level can be a filled outermost energy level if there are 2 electrons in the Group 1 and 2 elements in the Periodic Table.

True

_________________ electrons are used to form bonds.

Valence

The number of electrons in an atom can be determined from the _____________ number of the element.

atomic

An interaction that holds two atoms together is called a (chemical/ionic) bond.

chemical

When (chemical/ionic) bonds form, electrons are shared, gained or lost.

chemical

Having 8 valence electrons is a special condition. Atoms that have 8 electrons in their outermost energy level (do/do not) usually form bonds. Thus, atoms of Noble Gases (group 18) (except _________) do not normally form bonds.

do not Helium

The atomic number is the number of protons in an atom. But atoms have no charge. So the atomic number also represents the number of _____________ in the atom.

electrons

Electrons in an atom are organized in ____________ levels.

energy

Atoms bond by _____________, ____________, or sharing electrons to have a filled outermost energy level.

gaining losing

Most atoms form bonds using only the electrons in the (innermost/outermost) energy level.

outermost

The number of electrons in the (innermost/outermost) energy level of an atom determines whether an atom will form bonds.

outermost

You can use a model or the _______________ to determine the number of valence electrons for atoms of some elements.

periodic table

An electron in the outermost energy level of an atom is a ____________ electron.

valence