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Chemistry

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Lesley Schulist

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Cards in this guide (13)
What does percent composition tell you about a molecule

It tells you how much of a molecule is made up of each element. - APEX

How is the name of the second element in a covalent molecule changed

The ending of the second element is changed to -ide

Why are prefixes not needed in naming ionic compounds

Ions combine in only one ratio, so prefixes are not needed.

How do hydrogen bonds compare with other intermolecular forces

Hydrogen bonds are stronger than dipole-dipole and Van der Waals forces.

What is the correct electron configuration for Si atomic number 14
[Ne] 3s2 3p2
or2, 8, 4
What elements have the largest first ionization energy

Cl -apex.

What is the best definition of a physical change

Answer this question… Which of the following is the best definition of a physical change?

When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. What are these reactive mo

Free radicals

Which of the following has the smallest radius is K plus Rb Rb plus K

K+

When would dipole dipole be significant

Dipole-dipole forces play a significant role when a molecule is polar.

If the products of a reaction are CO2 and 2H2o what is known about the reactants

They do not include any C, O, or H atoms.

Which of the following has the largest radius K plus Na plus Na or K

Potassium has the largest atomic radius.

Which molecule or ion has a linear shape

BeCl2

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