Vocabulary
Atoms & Elements
Periodic Table
Ions
Solution
100
The chart that arranges elements by atomic number is the _______________.
Periodic table
100

True or False? Electrons are embedded in a positively charged sphere.

False

100

True or False- The periodic table arranges elements with similar properties into columns.

True

100

I am an atom that has lost one electron. Do I have a positive or a negative charge?

Positive

100

What kind of mixture is a solution? Spell it.

Homogeneous mixture

200
The ___________ of an element determines its properties.
Atomic Number
200

What is another name for Thomson’s atomic model?

Plum-pudding model

200

What do elements share or transfer to form compounds?

Electrons

200

If I am an atom with a positive charge, do I have more protons than electrons, more electrons than protons, or the same amount of each?

More protons than electrons

200

What is an aqueous solution? Give an example. 

A solution in which the solvent is water.

Example: coffee, tea... many possible answers.

300
The smallest unit of an element that still has the properties of the element is an _____________.
Atom
300

What experiment led a scientist to conclude that an atom is mostly empty space?

Gold foil experiment

300

How do compounds and elements differ?

Elements have one kind of atom; compounds have different kinds of atoms.

300

It is very unlikely you will find me in the form of an ion. Which group on the periodic table am I in, and what am I?

Group 8 (noble gas)

300

What does concentration mean, and what are the units when we use the formula C=m/v?

Concentration is the amount of solute in a solution.

m is in g, v is in mL, C is in g/L

400
What are the three subatomic particles that make up an atom and their charges?
Proton-positive, Neutron-no charge, Electron-negative
400

What charge do cathode rays have?

Negative charge

400

True or false? Valence electrons are found in the innermost shell of an atom.

False: they are on the outermost shell

400

How many electrons does nitrogen want to gain or lose as an ion?

Nitrogen wants to gain 3 electrons.

400

What is 1 ppm equal to, and what does ppm stand for?

1 ppm = 1 mg/L


ppm stands for parts per million. It is a unit of concentration.

500

The center of every atom and contains at least one proton. (Spell it.)

Nucleus

500

Which atomic model representation shows ONLY the valence electrons? Draw it for chlorine.

Lewis notation

500

Which elements on the periodic table follow the duet rule... and what is it?

Li and Be.

The duet rule explains how lithium and berrylium want to be stable like the nearest noble gas to them, helium - it has only two valence electrons.

500

What is the octet rule?

The tendancy for elements to acquire the electron configuration of the noble gas nearest to them on the periodic table.

500

A saline solution that is used to dissolve drugs is 0.92% (m/v) NaCl in water.  How many grams of NaCl are required to prepare 35.0 mL of normal saline solution?

Show your work on the board, with all the steps and correct units.




0.32 g

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