Question 1

Matter is anything that has weight and takes up space.

Accepted Answer

This statement is true according to the definition of matter in science. Matter is made up of particles, has mass, and takes up space.

Question 2

At present,there are 90 known naturally occurring ________.

Accepted Answer

elements

Question 3

The atomic ________ of an atom of an element equals the number of protons and neutrons in its nucleus.

Accepted Answer

weight

Question 4

An element with an atomic number of 6 contains 12 protons.

Accepted Answer

The atomic number represents the number of protons in an element's nucleus. Therefore, an element with an atomic number of 6 contains 6 protons, not 12.

Question 5

Understanding ________ is essential for understanding anatomy and physiology because body structures and functions result from chemical changes.

Accepted Answer

The answer of Understanding ________ is essential for understanding anatomy...

Question 6

Which elements make up 95% (by weight)of the human body?

Accepted Answer

Carbon, hydrogen, oxygen, and nitrogen make up 95% (by weight) of the human body.

Question 7

When atoms combine with other atoms,interactions occur between their ________ shells.

Accepted Answer

The answer of When atoms combine with other atoms,interactions occur...

Question 8

Which of the following substances is NOT an element?

Accepted Answer

Water is a compound made up of two elements, hydrogen and oxygen.

Question 9

The atoms of the isotopes of a particular element vary in the number of

Accepted Answer

Isotopes of an element have the same number of protons (which defines the element), but they differ in the number of neutrons in their nuclei. This difference in neutron number gives isotopes their different atomic mass.

Question 10

The parts of an atom that lack an electrical charge are called ________.

Accepted Answer

The answer of The parts of an atom that lack...

Question 11

Chemistry is the branch of science that deals with the composition of matter.

Accepted Answer

Chemistry is the scientific field concerned with the study of the composition, structure, properties, and changes of matter.

Question 12

Which of the following is the number of elements living organisms require?

Accepted Answer

Living organisms require 20 elements, including carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, and 14 trace elements.

Question 13

Each element is composed of characteristic tiny particles called ________.

Accepted Answer

The answer of Each element is composed of characteristic tiny...

Question 14

All of the food that we eat,liquids that we drink and medications that we take are

Accepted Answer

All of the food, liquids, and medications we consume are composed of chemical compounds. The other options (vitamins, proteins, nucleic acids, and carbohydrates) are specific types of chemicals that may be present in some of the substances we consume, but do not encompass all of them.

Question 15

The atomic weight of an atom of an element equals the number of neutrons in its nucleus.

Accepted Answer

The atomic weight of an atom equals the sum of its protons and neutrons, while the number of neutrons may vary within isotopes of the same element.

Question 16

All matter is composed of atoms of fundamental substances called ________.

Accepted Answer

The answer of All matter is composed of atoms of...

Question 17

The number of protons in the atoms of a particular element is called the element's atomic ________.

Accepted Answer

The answer of The number of protons in the atoms...

Question 18

________ is defined as anything that has weight and takes up space.

Accepted Answer

The answer of ________ is defined as anything that has...

Question 19

The electrons of an atom occupy one or more areas of space called

Accepted Answer

The electrons of an atom are arranged in shells or energy levels around the nucleus. Each shell can hold a certain number of electrons, and as the atomic number increases, more shells are added.

Question 20

The electrons in the outermost shell of an atom determine its

Accepted Answer

The electrons in the outermost shell, also known as the valence electrons, play a crucial role in determining the chemical behavior of an atom. This is because they are involved in chemical reactions and bonding with other atoms to form molecules. The other options, such as shape, weight, mass, and atomic number, are determined by other factors such as the arrangement and number of protons and neutrons in the nucleus.

Quiz 2: Chemical Basis of Life