Chem 1A Review Part II

Chapter 2

100

This element contains 50 protons in its nucleus

Tin

200

The first group of the periodic table is comprised of elements referred to as these, who's properties include being extremely reactive and very soft 

alkali metals

300

The phrase "Have No Fear Of Ice Cold Beers," in a mnemonic device used to remember the diatomic elements. Like this one that makes up the majority of the air.

Nitrogen (N₂)

400

An atom's atomic mass comes from a weighted average of that atom's naturally occurring these, where an excess or lack of neutrons make the atom slightly heavier or lighter.

Isotopes

500

Some elements occur naturally as polyatomic molecules, such as sulfur, whose naturally occurring chemical formula is this. 

S₈

Chapter 4

100

The chemical formula of water is H₂O, meaning that for every 1 mol of oxygen, there are this many mols of hydrogen.

2!

200

How many Carbon atoms are found in one mole of methane (CH4) molecules?

6x10²³ atoms C

300

This is the molar mass of Carbon dioxide

44.01 g/mol

400

This value represents the molarity of a soln made by adding 45.5g of NaNO₃ to a flask and dissolving it with water to create a total volume of 2.50 L

0.214 M

500

This is the amount in mL of 0.155 M KCl solution containing 2.55g KCl

221 mL

Chapter 6

100

Where compounds like sugar dissolve, creating a homogenous solution in a solvent, ionic compounds do this, separating into ions in a solvent.

Dissociate. 

200

Along with HCl, this is another strong acid containing Chlorine.

HClO₄ (perchloric acid)

300

Sometimes an intermediate product will decompose to form a gas, including this aqueous compound which will decompose into liquid water and Ammonia gas

NH₄OH_(aq)

400

This is the oxidation state on Carbon in CO₂

+4 

500

In the following reaction, the reducing agent is this

2Mg(s) + O₂(g) -> 2MgO(s)

Magnesium

Chapter 8

100

This is the lowest energy color on the visible spectrum

Red

200

X-rays, are much higher in energy and frequency, than these waves you use to heat up your food.

Microwaves 

300

The are the respective letter designations for quantum number l=0,1,2,3

s,p,d,f

400

This value is the energy of a photon from a firefly squid (450 nm)

4.41x10^-19J

500

A nitrogen gas laser pulse with a wavelength of 337nm contains 3.83 mJ of energy contains this many photons

6.50x10¹⁵ photons

Chapter 10

100

According to the octet rule, most atoms tend to be more stable when they have this many electrons surrounding them, with the exception of Hydrogen.

8 Electrons

200

This atomic quality, describing an ability to attract electrons to a covalent bond, increasing moving left to right across the periodic table

Electronegativity 

300

While most atoms prefer an octet, some can exceed 8 valence electrons. Others, like this metalloid, form an incomplete octet with only 6 electrons.

Boron 

400

The Lewis Structure for NCl₃ has this many lone pairs of electrons on its central atom. 

1 pair

500

The electron geometry of PCl₃

Tetrahedral