🌿 Science & Nature Trivia
Quiz Set 2 — Chemistry
Answer all 10 questions. Click an option to see if you got it right!
Question 1 of 10
What is the chemical symbol for gold?
Au comes from the Latin word 'aurum,' meaning gold.
Question 2 of 10
What is the pH of pure water?
Pure water at 25 degrees Celsius has a pH of 7, which is considered neutral.
Question 3 of 10
What gas do we exhale when we breathe?
When we breathe out, we primarily exhale carbon dioxide as a waste product of cellular respiration.
Question 4 of 10
What is table salt's chemical formula?
NaCl (sodium chloride) is the chemical compound commonly known as table salt.
Question 5 of 10
How many elements are in the periodic table (as of 2024)?
There are 118 confirmed elements in the modern periodic table.
Question 6 of 10
What is the most abundant gas in Earth's atmosphere?
Nitrogen makes up approximately 78% of Earth's atmosphere by volume.
Question 7 of 10
What type of bond involves sharing electrons?
In a covalent bond, atoms share pairs of electrons to achieve stability.
Question 8 of 10
What is the chemical formula for water?
H2O indicates each water molecule contains two hydrogen atoms and one oxygen atom.
Question 9 of 10
Which element has the atomic number 1?
Hydrogen is the lightest and most abundant element in the universe with atomic number 1.
Question 10 of 10
What is an exothermic reaction?
An exothermic reaction releases energy, usually in the form of heat, to its surroundings.