Base and Bubbles Revision Flashcards
What does ‘atomic number’ mean?
the number of a chemical element in the periodic system
What does “mass number’ mean?
the amount of the numbers of protons and neutrons in the nucleus of an atom.
What is a element?
a substance consisting one type of atom
What is a compound?
A pure chemical substance consisting 2 or more different chemical substances
What is a mixture?
A mixture that consists of visibly different substances or phases
Explain what a chemical formulae is.
A short way to write a compound using symbols.
What are the physical properties of metals?
Malleability (being able to be shaped)
Electrical conductivity ( where a electric charge or heat can pass through a metal.)
Lustre (Shiny/reflective)
Ductility (Being able to be drawn into a wire)
What is the word equation for metals and acid?
METAL + ACID → METAL COMPOUND (SALT) + HYDROGEN GAS
What is the word equation for metals and water?
METAL + WATER → METAL HYDROXIDE + HYDROGEN GAS
What is an alkali?
A chemical that can dissolve in water, combine with acids to form salts, and make acids less acidic.
What is an acid?
An acid is a substance that produces hydrogen (H+) ions when it is added to water.
Define what a pH level is.
A measure of how acidic or basic a substance or solution is.
What are some examples of acids, alkalis and neutrals?
ACIDS: Vinegar, Lemon, Soda, Car battery
ALKALIS: Toothpaste, drain cleaner, bleach, ammonia
NEUTRALS: milk, water, blood, egg
Explain how acid rain is formed.
Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
What is the word equation for neutralisation?
acid + alkali → salt + water
