Chemistry 121 - Unit 2

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vocabulary and things to note examples from homework on mychemistry

1s2, 2s2,2p6, 3s2, 3p6,4s2, 4p6, 3d10, 5s2, 5p6, 4d10, 6s2, 6p10, etc..

what is the full electron configuration

s,p, d, f

what are the shells

principal quantum number

The ______ _____ _____ describes the energy level of an atom's orbitals and has an integer number greater than or equal to 1.

electron configuration

An atom's ____ _____ describes how its electrons are arranged in the various orbitals.

subshell

A _____ is designated as s, p, d, or f.

valence electron

An electron in the outermost shell of an atom is a ____ _____.

electron shell

A _____ _____ is composed of one or more subshells and contains a specific maximum number of electrons.

True

True or False? Period 3 elements have an inner electron configuration of [Ne].

True.

True or False? The valence electrons of group 1A elements are in a s subshell.

True.

True or False? Period 4 elements have six 3p electrons.

True

True or False? The highest principal quantum number of period 3 elements is 3.

True.

True or False? Group 8A elements have full outer prinsipal s and p subshells.

False.

True or False? The valence electrons of group 6A elements are in the 7s subshell.

False.

True or False? Period 4 elements have an inner electron configuration of [Kr].

False

True or False? The highest principal quantum number of period 2 element is 3.

P

Which species has the following electronic configuration: 1s2, 2s2, 2p6, 3s2, 3p3 ? Si, P, S, Al

Magnesium will lose two electrons

To form a stable ion, will magnesium gain or lose electrons? How many electrons?

Nonmetals

_______ tend to gain electrons to form anions.

Metals

______tend to lose electrons to form cations.

Si4-

The ion that has 14 protons and 18 electrons is ________.

N4-
Si4+
N4+
Si4-

cation

A positively charged ion has lost electrons and is called a ____.

anion

a negatively charged ion has gained electrons and is called an ______.

because their valence shells are full

Why are Noble gases are especially stable ?

2,8,18,32

What is the maximum number of electrons that can be contained in the first, second, third, and fourth energy levels, respectively?

2,6,10,14

Enter the maximum number of electrons in each type of sublevel (s, p, d, and f, respectively).

True

True or False? For a neutral molecule, the number of electrons in the Lewis structure is the sum of the valence electrons for the atoms.

True

True or False? Electrons of covalent compounds may be shared between atoms.

False

True or False? Hydrogen atoms are often the central atom of a Lewis structure.

False

True or False? Each atom of a Lewis structure must have eight electrons.

10

A covalent compound is composed of a nitrogen atom, a hydrogen atom, and a carbon atom. How many electrons should the Lewis structure of the covalent compound contain?

a metal and a nonmetal; cation and an anion

An ionic compound is usually formed when____ and exchange electrons to make _____ and ____, respectively.

resonance structures

When it is possible to draw more than one correct Lewis dot structure for a molecule or ion. These_____ ______ differ only by the placement of the valence electrons.

ammonium; polyatomic ion

What is the name of NH4^+ and what kind of ion is it?

nitrate; polyatomic ion

what is the name of NO3^- and what kind of ion is it?

sulfate; polyatomic ion

what is the name of SO4^2- and what kind of ion is it?

carbonate; polyatomic ion

what is the name of CO3^2- and what kind of ion is it?

Phosphate; polyatomic ion

what is the name of PO4^3-and what kind of ion is it?

chlorate; polyatomic ion

what is the name of CLO3^- and what kind of ion is it?

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