Chemistry Concepts Quiz

What do we call the perspective from which we see and interpret all of life?

• a. a model

• b. reality

• c. worldview

• d. an opinion

All scientists approach their work with a certain ________, which is the perspective from which they see and interpret all of life.

• reasoning

• worldview

• hypothesis

• model

How many atoms of oxygen are there in a molecule of penicillin G (C16H18N2O4S)?

• 2

• 4

• 10

• 20

The first law of thermodynamics is also called the law of ________.

• entropy

• cause and effect

• thermal energy

• conservation of mass-energy

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An evaluation of the exactness of a measurement or a measuring instrument indicates its _________.

• precision

• accuracy

• percent error

• both accuracy and precision

Who first identified and named the proton?

• Niels Bohr

• James Chadwick

• Ernest Rutherford

• J. J. Thomson

How many neutrons does the isotope 125/52 Te have?

• 73

• 52

• 125

• 177

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What chemist arranged the elements according to increasing atomic masses and thereby discovered the relationship that he called the law of octaves?

• Henry Cavendish

• John Newlands

• Henry Moseley

• Linus Pauling

Which of these is not typically found in a cell on the periodic table?

• a. atomic number

• b. electron structure

• c. electronegativity

• d. atomic mass

Why do elements in the same group have similar physical and chemical properties?

• They have a similar surface area.

• They have a similar electrical charge.

• They have a similar nuclear construction.

• They have a similar electron configuration.

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