Biology Chapter 2: Chemical Building Blocks Quiz

Which of the following is a substance formed when two or more elements chemically combine in fixed ratios?

Compound

What is the basic unit of a chemical element?

Atom

Which type of ion is formed when an atom gains one or more electrons?

Anion

What are variants of a chemical element that have the same number of protons but a different number of neutrons in their nuclei?

Isotopes Signup and view all the answers

What is a positively charged ion formed when an atom loses one or more electrons?

Cation Signup and view all the answers

Which particle is formed when an atom gains or loses electrons?

Ion Signup and view all the answers

What is the charge of a proton?

Positively charged Signup and view all the answers

Where are electrons located in an atom?

Outside the nucleus in electron orbitals Signup and view all the answers

What determines the element to which an atom belongs?

Atomic number Signup and view all the answers

What is a covalent bond?

A bond formed by the sharing of electron pairs between atoms Signup and view all the answers

What is the mass of a neutron?

Approximately 1 atomic mass unit (amu) Signup and view all the answers

Which of the following compounds has covalent bonds?

$CO_2$ (Carbon Dioxide) Signup and view all the answers

Where are protons located in an atom?

In the atom's nucleus Signup and view all the answers

What is the charge of an electron?

$-1$ elementary charge Signup and view all the answers

Which subatomic particle contributes most to an atom's mass?

Neutron Signup and view all the answers

What allows each atom to attain a more stable electron configuration in a covalent bond?

Sharing of electron pairs between atoms Signup and view all the answers

Which of the following accurately describes the formation of a compound?

A compound is formed when two or more elements chemically combine in fixed ratios. Signup and view all the answers

What is the primary factor leading to variations in atomic mass among isotopes of the same element?

Variations in the number of neutrons Signup and view all the answers

When an atom gains electrons, it becomes:

A negatively charged ion Signup and view all the answers

What type of ion is attracted to negatively charged ions and often involved in ionic bonds?

A cation Signup and view all the answers

What is the basic unit of a chemical element?

Atom Signup and view all the answers

In an ionic bond, what contributes to the formation of positively and negatively charged ions?

Transfer of electrons between atoms Signup and view all the answers

What is the primary location of electrons in an atom?

Electron orbitals Signup and view all the answers

What determines the element to which an atom belongs?

Proton count Signup and view all the answers

Which type of chemical bond involves the sharing of electron pairs between atoms?

Covalent bond Signup and view all the answers

Where are neutrons located in an atom?

Nucleus Signup and view all the answers

Which particle contributes most to an atom's mass?

Neutron Signup and view all the answers

Which of the following compounds contains covalent bonds?

Carbon dioxide (CO₂) Signup and view all the answers

What is the charge of an electron?

-1 elementary charge Signup and view all the answers

What is the mass of a neutron?

~1 atomic mass unit (amu) Signup and view all the answers

What allows each atom to attain a more stable electron configuration in a covalent bond?

Sharing of electron pairs Signup and view all the answers

Biology Chapter 2: Chemical Building Blocks Quiz

Questions and Answers

Which of the following is a substance formed when two or more elements chemically combine in fixed ratios?

What is the basic unit of a chemical element?

Which type of ion is formed when an atom gains one or more electrons?

What are variants of a chemical element that have the same number of protons but a different number of neutrons in their nuclei?

What is a positively charged ion formed when an atom loses one or more electrons?

Which particle is formed when an atom gains or loses electrons?

What is the charge of a proton?

Where are electrons located in an atom?

What determines the element to which an atom belongs?

What is a covalent bond?

What is the mass of a neutron?

Which of the following compounds has covalent bonds?

Where are protons located in an atom?

What is the charge of an electron?

Which subatomic particle contributes most to an atom's mass?

What allows each atom to attain a more stable electron configuration in a covalent bond?

Which of the following accurately describes the formation of a compound?

What is the primary factor leading to variations in atomic mass among isotopes of the same element?

When an atom gains electrons, it becomes:

What type of ion is attracted to negatively charged ions and often involved in ionic bonds?

What is the basic unit of a chemical element?

In an ionic bond, what contributes to the formation of positively and negatively charged ions?

What is the primary location of electrons in an atom?

What determines the element to which an atom belongs?

Which type of chemical bond involves the sharing of electron pairs between atoms?

Where are neutrons located in an atom?

Which particle contributes most to an atom's mass?

Which of the following compounds contains covalent bonds?

What is the charge of an electron?

What is the mass of a neutron?

What allows each atom to attain a more stable electron configuration in a covalent bond?

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