Question 1

Which subatomic particle is responsible for the chemical behavior of an atom, and where is it located?

Accepted Answer

Electron; located in electron shells surrounding the nucleus

Question 2

A carbon atom has 6 protons, 6 neutrons, and 6 electrons. What is its atomic number and mass number?

Accepted Answer

Atomic number: 6, Mass number: 12

Question 3

Which of the following best describes an isotope?

Accepted Answer

Atoms of the same element with different numbers of neutrons

Question 4

Which type of mixture is represented by blood, where particles are visible and settle out over time?

Accepted Answer

Suspension

Question 5

Milk is an example of which type of mixture, where particles do not settle out and are not visible?

Accepted Answer

Colloid

Question 6

Which statement correctly describes the difference between a compound and a mixture?

Accepted Answer

Compounds have new chemical properties; mixtures retain the properties of their components

Question 7

If an atom has 11 protons, 12 neutrons, and 10 electrons, what is its charge and what element is it?

Accepted Answer

Charge: +1; Element: Sodium ($$Na)$$

Question 8

Which of the following is true about electron shells and chemical reactivity?

Accepted Answer

Atoms are stable when their outermost electron shell is full

Question 9

A solution is made by dissolving salt in water. In this scenario, which is the solute and which is the solvent?

Accepted Answer

Salt is the solute; water is the solvent

Question 10

Which of the following best explains why water is considered a universal solvent?

Accepted Answer

Water has partial positive and negative charges that attract and dissolve many ionic and polar compounds

Question 11

Given the following scenario: A patient receives an intravenous solution containing glucose and electrolytes. Which type of mixture is this, and why?

Accepted Answer

Solution; because the solutes are dissolved and do not settle out

Question 12

Which of the following statements about atomic structure is correct?

Accepted Answer

Protons and neutrons are found in the nucleus; electrons are found in electron shells

Question 13

Which of the following is NOT a property of elements?

Accepted Answer

Elements can be broken down into simpler substances by chemical means

Question 14

If a mixture contains visible particles that settle out over time, which type of mixture is it most likely to be?

Accepted Answer

Suspension

Question 15

Which of the following best describes a colloid?

Accepted Answer

A mixture with small particles that do not settle out and are not visible

Question 16

Which of the following is true regarding the atomic number and mass number of an element?

Accepted Answer

Atomic number is the number of protons; mass number is the sum of protons and neutrons

Question 17

Which of the following is a real-world example of a suspension?

Accepted Answer

Blood with red blood cells

Question 18

Which of the following statements about mixtures is correct?

Accepted Answer

Mixtures retain the chemical properties of their components

Question 19

A scientist analyzes a sample and finds it contains only one type of atom. What is the sample?

Accepted Answer

An element

Question 20

Which of the following best explains why isotopes of the same element have different mass numbers?

Accepted Answer

They have different numbers of neutrons

Chapter: Chemistry of Life – Study Notes for Anatomy & Physiology

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