Biology Chapter 2 Study Guide

Front

How many electrons are there in an oxygen atom?

Back

8

Front

What is an ionic bond?

Back

A bond formed when one or more electrons are transferred from one atom to another.

Front

What is heat capacity?

Back

The amount of energy needed to raise a substance’s temperature by making its molecules move faster.

Front

How are isotopes identified?

Back

Mass number.

Front

What is cohesion?

Back

The attraction between molecules of the same substance.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is a covalent bond?

Back

A bond formed by sharing electrons between atoms.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the pH scale?

Back

A scale used to measure the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is a hydrogen bond?

Back

A weak bond formed between a hydrogen atom and an electronegative atom.