Balanced Equations and Ions

These flashcards cover key concepts related to balanced equations and ions, extracted from the lecture notes.

What is an element?

A substance that cannot be broken down into simpler substances and is composed of the same type of atoms.

What does the formula CO2 indicate about its composition?

It contains 1 Carbon atom and 2 Oxygen atoms.

What is the conservation of mass in relation to chemical equations?

Mass cannot be created or destroyed; the same number of atoms must exist on both sides of the equation.

What happens when an atom loses or gains electrons?

It becomes charged and is called an ion.

What is a positive ion?

An ion that has lost one or more electrons, resulting in a net positive charge.

What are protons and electrons?

Protons are positive parts of an atom, while electrons are negative parts.

How is sodium ion (Na+) formed?

Sodium (Na) loses one electron, resulting in a positive charge.

What is the result when an ion becomes charged?

It is attracted to another oppositely charged ion.

What is the charge of a magnesium ion if it loses 2 electrons?

+2 charge.

How many hydrogen atoms are in the molecule H2SO4?

2 hydrogen atoms.

What must be true for an equation to be balanced?

The same number of each type of atom must be present on both sides of the equation.

What are the chemical symbols for Carbon, Sodium, and Iron?

C for Carbon, Na for Sodium, and Fe for Iron.