Chemistry Stuff
What branch of science studies matter and how it changes?
Chemistry
What is the chemical symbol for sodium?
Na
What are the three main subatomic particles?
Protons, neutrons, and electrons.
What is the chemical formula for water?
H₂O
What is the charge of a calcium ion?
2+ (Ca²⁺)
What are the three common states of matter?
Solid, liquid, and gas.
What is the atomic number of carbon?
6
Which subatomic particle has a positive charge?
Proton.
Is NaCl an element or a compound?
A compound.
Is a solution with a pH of 3 acidic or basic?
Acidic.
What type of change creates a new substance?
A chemical change.
Which family of elements is found in Group 1?
Alkali metals.
Where are electrons found in an atom?
Electron shells.
What type of bond forms when electrons are transferred from one atom to another?
An ionic bond.
What is the pH of a neutral solution?
7
What is a substance that you start with in a chemical reaction called?
A reactant.
What are elements in the same vertical column called?
A group or family.
An atom has 11 protons. What is its atomic number?
11.
What is the chemical formula for ammonia?
NH₃
How many atoms are there in one molecule of H₂SO₄?
7 atoms (2 hydrogen + 1 sulfur + 4 oxygen).
What type of reaction occurs when two or more substances combine to form one product?
A synthesis reaction.
Which element has the atomic number 17?
Chlorine (Cl).
An atom has 8 protons and 10 electrons. What is its overall charge?
−2 (a 2− ion).
What is the correct formula for magnesium chloride?
MgCl₂
Balance this equation: Mg + O₂ → MgO
2Mg + O₂ → 2MgO