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WorksheetsUnit 2 - Periodic Table
Total questions: 51
Worksheet time: 2hrs 33mins
Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below. Which student’s responses are correct?
Student 1
Student 2
Student 3
Student 4
Which pair of properties describes the elements in Group 18?
They are chemically stable and liquid at room temperature.
They have eight valence electrons and are flammable.
They are magnetic and boil at low temperatures.
They are gaseous at room temperature and chemically stable.
Which statement does NOT correctly compare silicon with another element?
Silicon is a better conductor of electricity than sulfur.
Silicon is less malleable than silver.
Silicon is a solid at room temperature, but argon is a gas.
Silicon conducts electricity as well as copper does.
Which two elements on the periodic table are in the same period?
C and Sn
F and Cl
Mg and Ar
Se and Te
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?
The element is sodium, and it is highly reactive.
The element is fluorine, and it is not very reactive.
The element is sodium, and it is not very reactive.
The element is fluorine, and it is highly reactive.
A student drew atomic models of four elements. Based on these drawings, which element is the least reactive?
Neon, because it has two energy levels with eight electrons in the second level
Chlorine, because it has three energy levels with seven electrons in the third level
Gallium, because it has four energy levels with three electrons in the fourth level
Tin, because it has five energy levels with four electrons in the fifth level
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?
Will the material float in water?
Does the material feel hard to the touch?
Is the material malleable or ductile?
Does the material feel rough or smooth?
Elements in the group of noble gases typically fail to chemically react with other elements. This is true because noble gases tend to have —
a single valence electron in its outer shell.
a full outer shell of valence electrons.
fewer neutrons than other elements.
more protons than other elements.
Students were asked to identify the location of elements in the periodic table based on clues printed on game cards. Based on the data, which periodic table shows the correct location of the four elements?
The element sodium (Na) occurs naturally as a light solid with a shiny metallic appearance. The diagram below shows what will happen when a piece of pure sodium is placed in water. This indicates that the properties of the elements in the same column on the periodic table as sodium (Na) have —
the tendency to be highly reactive.
properties of metals and nonmetals.
a full octet of eight electrons in their outer shell.
brittle textures so they disintegrate in water.
A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The density of calcium, which is 1.54 g/cm3
The 2 valence electrons in each atom of calcium
The atomic mass of calcium, which is 40.078 amu
Alkali earth metals are extremely reactive.
True
False
How many valence electrons does carbon have?
4
5
6
7
How many electrons can fit on the 1st energy level (orbital) for any Bohr Model?
2
6
8
10
This is the location of electrons in an atom.
nucleus
protons
orbitals
neutrons
A __________ is a subatomic particle with a positive charge.
proton
neutron
electron
nucleus
A __________ is a subatomic particle with a neutral charge.
proton
neutron
electron
nucleus
Protons + Neutrons =
the average atomic mass
mass number
number of electrons
APE MAN
