An Introduction To Chemistry
Answer Sheet
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Chemistry, 19.04.2021 08:20 madelineb6243
An Introduction To Chemistry
Answer Sheet
Please provide your answer in the answer sheets!
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An Introduction To Chemistry
1. During his distinguished career this scientist received two unshared Nobel prizes. One for chemistry and one for peace.
Alfred Nobel
Marie Currie
Linus Pauling
Albert Einstein
2. The study of matter and the changes it undergoes describes the science of .
physics
mathematics
chemistry
biology
3. The is the fundamental unit of matter.
atom
compound
nucleus
proton
4. The atom is composed of three subatomic particles known as , and .
neutrals, electives and peeons
quarks, alpha rays and xenons
electrons, protozoans and electricals
protons, neutrons and electrons
5. Protons are charged particles found in the nucleus of an atom.
neutrally
positively
negatively
brighltly
6. Electrons are charged particles that orbit the nucleus of an atom.
negatively
positively
neutrally
brighltly
7. Neutrons are particles found in the nucleus of an atom.
negatively charged
positively charged
uncharged
brightly
8. An ion is an atom or molecule that .
is electrically neutral
is composed of two or more elements
is man made
carries a charge
9. Which of the following chemical species is a cation?
Cl-
H+
Au
HCO3-
10. The atomic number of an atom or element describes the number of .
electrons orbiting the nucleus
neutrons in the nucleus
alpha particles in the nucleus
protons in the nucleus
11. Mass is proportional to the number of that make up an object.
atoms
cells
neutrons
protons
12. Weight is best described as .
the number of atoms in an object
the pull of gravity on matter
the electrical charge on an ion
the number of electons in an atom
13. Atoms of any one type of element, such as gold, all posess the same number of .
electrons
neutrons
protons
nuclei
14. There are currently known elements.
65
98
112
152
15. Element are one or two letter abbreviations for the names of the elements.
numbers
atomic numbers
symbols
characters mass
16. Two or more elements that combine as a result of a chemical reaction form .
atoms
ions
mixtures
compounds
17. An example of a mixture would be .
a bar of pure gold
the air we breathe
sodium chloride salt
pure water
18. The three states of matter are , and .
atoms, molecules and compounds
atoms, compounds and mixtures
solids, liquids and gases
solids, gases and steam
19. The least dense and most energetic of the three states of matter is .
the gaseous state
the liquid state
the solid state
the elemental state
20. All measurements must consist of both .
a size and a shape
a price and a volume
a number and a unit
a color and a number
21. Density is a physical property that refers to .
the number of atoms in an object
the weight of an object
the mass of an object relative to its volume
the weight of an object relative to its cost
22. A kilogram is equal to grams.
1
10
100
1,000
23. There are centimeters in a meter.
1
10
100
1,000
24. Measurements are because of equipment error and human judgment.
useless
uncertain
perfect
inaccurate
25. The number 221.5 contains significant figure(s).
1
2
3
4
26. The number .001 contains significant figure(s).
1
2
3
4
27. The number 226 would be scientifically noted as .
226
2.26 x101
2.26 x 102
22.6 x 101
28. The figure .005 would be scientifically noted as .
5 x 10-1
5 x 10-2
5 x 10-3
5 x 10-4
29. Elements or atoms are arranged on the periodic table in the order of increasing .
atomic mass
atomic weight
atomic number
atomic symbols
30. A substance that weighs 10 grams and has a volume of 2 cm3 would have a density of .
5 g/cm3
10g/cm3
2g/cm3
15g/cm3
31. The terms Kelvin, Celsius and Fahrenheit all correspond to units of .
density
hardness
volume
temperature
32. The is the SI standard unit for measurements of length.
cetimeter
foot
meter
yard
33. One kilogram is equal to approximately pounds.
1.2
2.2
3.2
4.2
Answers: 3
Chemistry, 21.06.2019 21:30, taralynnn8870
Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry
Answers: 1
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Table sugar completely dissolved in water is an example of a?
Answers: 1
Chemistry, 22.06.2019 14:30, Priskittles
What state of matter is ice a. liquid b. element c. solid d. gas
Answers: 1
Chemistry, 22.06.2019 16:00, sassy11111515
The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride
Answers: 1
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