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- 1. Multiple Choice
Which statement accurately describes the atoms of a specific element?
An indium In, atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus
A scandium, Sc, atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus
An aluminum, Al, atom contains 27 electrons and 27 protons inside the nucleus
A zinc, Zn, atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.
- 2. Multiple Choice
How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 178?
72 protons, 178 neutrons, 106 electrons
72 protons, 106 neutrons, 72 electrons
178 protons, 250 neutrons, 72 electrons
106 protons, 72 neutrons, 106 electrons
- 3. Multiple Choice
Which statement correctly describes the location and charge of the electrons in an atom?
The electrons are inside the nucleus and have no charge.
The electrons are outside the nucleus and have no charge.
The electrons are inside the nucleus and have negative charge.
The electrons are outside the nucleus and have negative charge.
- 4. Multiple Choice
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 energy level
Tin, because it has five energy levels with four electrons in the fifth level
- 5. Multiple Choice
Based on the information from the table, which conclusion about the chemical reactivity of these elements is valid?
Boron is the most reactive because it has the most protons
Fluorine is the most reactive because it has 7 electrons in the outer shell
Silicon is the most reactive because it has an equal number of protons and neutrons
Gallium is the most reactive because it has many more neutrons than protons.
- 6. Multiple Choice
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, 1.54 g/cm^3
the atomic mass of calcium, 40.078
the 2 valance electrons in each atom of calcium
- 7. Multiple Choice
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
- 8. Multiple Choice
Which two elements on the periodic table are in the same period?
Sn and Rb
F and Cl
K and Ba
Se and Te
- 9. Multiple Choice
Which statement does NOT correctly compare silicon with another element?
Silicon is a better conductor of electricity than sulfur
Silicon conducts electricity as well as copper does
Silicon is a solid at room temperature , but argon is a gas
Silicon is less malleable than silver
- 10. Multiple Choice
Aluminum, sulfur, and chlorine are elements found on the periodic table. Tests involving these three elements would show that at normal room temperature---
sulfur is malleable and aluminum conducts electricity
chlorine is malleable and conducts electricity
aluminum is malleable and conducts electricity
all three elements are malleable and conduct electricity
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