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Worksheets3rd Nine Weeks Review Day 1
Total questions: 11
Worksheet time: 18mins
1.) The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?
A The element is sodium, and it is highly reactive.
B The element is fluorine, and it is not very reactive.
C The element is sodium, and it is not very reactive.
D The element is fluorine, and it is highly reactive.
2.) Elements in the group of noble gases typically fail to chemically react with other elements. This is true because noble gases tend to have —
F a single valence electron in its outer shell.
G a full outer shell of valence electrons.
H fewer neutrons than other elements
J more protons than other elements.
3.) How many protons are contained in the nucleus of an argon atom?
A 9
B 18
C 36
D 40
4.) How are the three elements above organized on the periodic table?
F Niobium and Cobalt are in the same period.
G Cobalt and Scandium are in the same period.
H Cobalt and Scandium are in the same group.
J Niobium and Cobalt are in the same group.
5.) How many valence electrons are in an atom of each element in Group 15 in the periodic table?
(a)
6.) Which of the following lists all the elements that are present in a molecule of potassium carbonate, K2CO3 ?
F carbon and oxygen
G phosphate and calcium
H potassium, carbon, and oxygen
J phosphorus, oxygen, and calcium
7.) The formula for baking soda is given. NaHCO3. This formula indicates that the most basic unit of baking soda contains —
A 1 hydrogen atom, 1 sodium atom, 3 carbon atoms, and 3 oxygen atom
B 1 sodium atom, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms
C 1 potassium atom, 1 helium atom, 1 carbon atom, and 1 oxygen atom
D 1 carbon atom, 1 helium atom, 1 calcium atom, and 3 oxygen atoms
8.) During a chemistry demonstration, a student added liquid hydrochloric acid,NaHCO3 , to a beaker holding powdered baking soda, . The solution in the beaker began to bubble and fizz as carbon dioxide gas,CO3 , escaped. How did combining a liquid and a solid produce a gas?
F The atoms in the hydrochloric acid and baking soda combined, forming a product with a different state but the same properties.
G Adding the hydrochloric acid to the baking soda superheated the hydrochloric acid, causing it to change phases.
H The atoms in the hydrochloric acid and baking soda REARRANGED, forming products with different properties.
J Adding the hydrochloric acid to the baking soda superheated the baking soda, causing it to change phases.
9.) A scientist performed four investigations using eight different liquids. In each investigation, the scientist combined two of the liquids under a fume hood and recorded observations in the table below.
In which investigation is it least likely that the liquids reacted chemically?
A 1
B 2
C 3
D 4
10.) Which diagram correctly shows the charges of the particles in a neutral beryllium atom?
F
G
H
J
11.) Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?
Based on the information in the table, which conclusion
A Boron is the most reactive because it has the most protons.
B Fluorine is the most reactive because it has 7 electrons in the outer shell.
C Silicon is the most reactive because it has an equal number of protons and neutrons.
D Gallium is the most reactive because it has many more neutrons than protons.
