Chemistry Review Flashcards

These flashcards are designed to help students review key concepts from their chemistry lectures, focusing on atomic structure, properties of matter, and essential chemical principles.

What is the atomic number of an element, and how is it related to the number of protons?

The atomic number is the number of protons in the nucleus of an atom, defining the element.

What is the formula for calculating density?

Density is calculated using the formula: Density = Mass/Volume.

Describe the arrangement and movement of particles in solids, liquids, and gases.

In solids, particles are closely packed in a fixed arrangement; in liquids, they are close but can move past each other; in gases, they are far apart and move freely.

What is the significance of the phase transition from solid to liquid?

This transition indicates the absorption of energy, leading to changes in the arrangement and movement of particles.

Define latent heat of fusion and provide an example.

Latent heat of fusion is the heat required to convert a solid into a liquid at its melting point, for example, ice melting to water.

What is a covalent bond, and how does it differ from an ionic bond?

A covalent bond involves the sharing of electron pairs between atoms, while an ionic bond involves the transfer of electrons between atoms, resulting in charged ions.

What distinguishes simple covalent compounds from giant covalent structures?

Simple covalent compounds consist of small molecules held together by covalent bonds, whereas giant covalent structures consist of a large network of atoms bonded covalently.

What is a mole, and how is it defined in chemistry?

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles of a substance.

Define molar mass and explain its significance in chemistry.

Molar mass is the mass of one mole of a substance, and it is significant for converting grams to moles in chemical reactions.

How many particles are contained in one mole of a substance?

There are 6.022 x 10^23 particles in one mole of a substance, known as Avogadro's number.