Exam 5 - Regular Chemistry - Krug

30 Questions | By Jkrug | Last updated: Mar 19, 2022 | Total Attempts: 83

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Exam 5 - Regular Chemistry - Krug - Quiz

An exam over nuclear chemistry and molecular shape.

Questions and Answers

1.

is the symbol for which of the following?
- A.
  
  Alpha particle
- B.
  
  Beta particle
- C.
  
  Gamma ray
- D.
  
  Positron
2.

⁺is the symbol for which of the following types of ionizing radiation?
- A.
  
  Beta particle
- B.
  
  Neutron
- C.
  
  Gamma ray
- D.
  
  Positron
3.

The type of radiation with the symbol can be stopped with which of the following?
- A.
  
  A sheet of paper
- B.
  
  A piece of plywood
- C.
  
  A thick lead wall
- D.
  
  A thin sheet of aluminum
4.

If a radioactive isotope has a half-life of 30 minutes, how long will it take for its amount to drop from 100 grams down to 25 grams?
- A.
  
  120 minutes
- B.
  
  30 minutes
- C.
  
  60 minutes
- D.
  
  90 minutes
5.

A radioactive isotope decreases from 60 grams down to 7.5 grams over a period of 100 seconds. Calculate the isotope's half-life.
- A.
  
  33.3 seconds
- B.
  
  25 seconds
- C.
  
  12.5 seconds
- D.
  
  50 seconds
6.

Fill in the missing particle in the following nuclear decay process:
- A.
- B.
- C.
  
  4
- D.
  
  2
7.

Fill in the missing particle in the following nuclear decay process:
- A.
- B.
- C.
- D.
8.

A radioactive nuclide has 17 protons and 19 neutrons. Its symbol is
- A.
- B.
- C.
- D.
9.

Most of an average American's radiation comes from which of the following sources?
- A.
  
  Atomic fallout
- B.
  
  Microwave ovens
- C.
  
  Natural sources
- D.
  
  X-rays
10.

A radiation dose of 5 rem in a human would most likely result in
- A.
  
  Nothing
- B.
  
  Nausea and vomiting
- C.
  
  Superhero abilities
- D.
  
  Death
11.

The average American is exposed to how much radiation over the course of one year?
- A.
  
  More than 1000 rem
- B.
  
  100 rem
- C.
  
  10 rem
- D.
  
  Less than 1 rem
12.

The diagram below represents what nuclear process?
- A.
  
  Neutron capture
- B.
  
  Nuclear fusion
- C.
  
  Nuclear fission
- D.
  
  Beta decay
13.

A radioactive gas that often leaks into basements, causing lung cancer, is
- A.
  
  Plutonium
- B.
  
  Uranium
- C.
  
  Xenon
- D.
  
  Radon
14.

Nuclear fusion commonly takes places in
- A.
  
  Nuclear power plants
- B.
  
  The sun and stars
- C.
  
  Smoke detectors
- D.
  
  Vehicle exhaust pipes
15.

The amount of time required for the amount of a radioactive isotope to be reduced by half is called its
- A.
  
  Half time
- B.
  
  Half life
- C.
  
  Half sleeve
- D.
  
  Half pint
16.

A high-powered electron emitted by a radioactive nucleus is called a
- A.
  
  Beta particle
- B.
  
  Alpha particle
- C.
  
  Gamma ray
- D.
  
  Neutron
17.

Nuclear power plants most commonly use which radioactive element?
- A.
  
  Carbon
- B.
  
  Polonium
- C.
  
  Radon
- D.
  
  Uranium
18.

How many valence electrons are found in a typical atom of fluorine?
- A.
  
  1
- B.
  
  2
- C.
  
  7
- D.
  
  8
19.

Which of the following elements is an exception to the octet rule?
- A.
  
  Carbon
- B.
  
  Silicon
- C.
  
  Sulfur
- D.
  
  Hydrogen
20.

In the molecule , which is the central atom?
- A.
  
  Hydrogen
- B.
  
  Nitrogen
- C.
  
  Neon
- D.
  
  Helium
21.

The molecule has two correct Lewis electron-dot structures. These two structures are called
- A.
  
  Resonance structures
- B.
  
  Nuclear isotopes
- C.
  
  Isomers
- D.
  
  Enantiomers
22.

The correct structural formula for CH₂O is Hint: Carbon is the central atom.
- A.
- B.
- C.
- D.
23.

The correct structural formula for is: Hint: Carbon is the central atom.
- A.
- B.
- C.
- D.
24.

Every single bond in a molecule will contain how many electrons?
- A.
  
  One
- B.
  
  Two
- C.
  
  Four
- D.
  
  Eight
25.

In the molecule N₂O, what is the total number of valence electrons that should appear in the electron-dot structure?
- A.
  
  8
- B.
  
  16
- C.
  
  24
- D.
  
  17