Periodic Table and Chemical Reactions Review

What is the atomic mass of Silicon?

28.0855 or 28

What do you call the substance(s) produced by a

chemical reaction?

products

Where do you find the products written in a chemical

equation?

To the right of the arrow

What is the atomic number of Silicon?

14

What does the arrow in a chemical equation mean?

yields

Who arranged the first periodic table?

Dmitri Mendeleev

Name the 5 indicators of a chemical reaction. (You will receive 1 point for each correct answer.)

1. Color change2. Gas production

3. Light production4. Temperature change5. Precipitate formation

Who rearranged the periodic table into its current format?

Henry Moseley

The current periodic table is arranged in order of ______.

Atomic number

What has luster, is malleable, ductile, and good conductor of heat and electricity?

metals

Hydrogen is highly flammable is an example of a _________ property.

chemical

What are usually gases or brittle solids and poor conductors?

nonmetals

Name an element that is MOST similar to Calcium.

Beryllium, Magnesium, Strontium, Barium, or

Radium

Name an element that has the same number of energy levels as Boron.

Lithium, Beryllium, Carbon, Nitrogen, Fluorine, Neon

What is the element symbol of Silicon? (must be written in correct format.

Si

How many valence electrons does Aluminum have?

3

Water boils at 100 degrees Celsius is an example of a _______ property.

physical

The MOST important subatomic particle to look at when determining chemical properties of an element is ___.

Valence electron

Using the periodic table and looking at elements 33, 34, 35, 52, and 53, which of the following statements is true?A. Selenium is most like Bromine.B. Iodine has more valence electrons than Tellurium.C. Bromine and Iodine have the same number of energy levels.D. Arsenic has more protons.

The atomic number of an element represents the number of ____________.

protons

What do you call the substance(s) before a

chemical reaction begins?

reactants

Where do you find the reactants written in a chemical equation?

To the left of the arrow

Lighting a match is an example of a ________ change.

chemical

What share properties of both metals and nonmetals?

metalloids

If a chemical equation is balanced, what law is it

following?

Law of conservation of mass

An element with the same number of valence electrons as Phosphorus is _____.

Nitrogen, Arsenic, Antimony, Bismuth

The group of elements that are the most reactive metals are in group number ____.

1 or 1A

The group of elements that are nonreactive gases are in group number _____.

18 or 8A

Ice melting is an example of a ___________ change.

physical

P4 + 5O22P2O5

What is the coefficient of the phosphorus molecule?

1

P4 + 5O22P2O5

What is the subscript of the phosphorus molecule?

4

Does this equation follow the law of conservation of mass?

3N2O5 + 3H2O 5HNO3

no

Does this equation follow the law of conservation of mass?

2HgO 2Hg + O2

yes

Which coefficients would balance the following equation? __ NaClO3 __ NaCl + __ 02

2, 2, 3

If 16 grams of oxygen are combined with 2 grams of hydrogen, how much water would be formed?

18 grams