Science Test
Science Test Review – Question Sheet
Periodic Table Trends
1⃣ What is the periodic table organized by?
2⃣ How many groups and periods are in the periodic table?
3⃣ What do elements in the same group have in common?
4⃣ What do elements in the same period have in common?
5⃣ What happens to atomic mass as you move down a group?
6⃣ What happens to valence electrons as you move across a period (left to right)?
Classification of Matter
7⃣ What is matter?
8⃣ What are the two main categories of matter?
9⃣ What are the two types of pure substances?
🔟 What is the difference between an element and a compound?
1⃣1⃣ What are the two types of mixtures?
1⃣2⃣ What is the difference between a homogeneous and a heterogeneous mixture?
How to Count Atoms
1⃣3⃣ What does a subscript tell you in a chemical formula?
1⃣4⃣ What does a coefficient tell you in a chemical formula?
1⃣5⃣ How many hydrogen and oxygen atoms are in 2H₂O?
1⃣6⃣ How many total atoms are in 3CuSO₄?
1⃣7⃣ In 4Pb(NO₃)₂, how many nitrogen and oxygen atoms are present?
Inside the Atom
1⃣8⃣ What are the three subatomic particles in an atom?
1⃣9⃣ Where are protons, neutrons, and electrons located?
2⃣0⃣ What is the charge of a proton, neutron, and electron?
2⃣1⃣ What is the mass of a proton and neutron?
2⃣2⃣ What is the atomic number of an element?
2⃣3⃣ How do you find the number of neutrons in an atom?
2⃣4⃣ What is the atomic number and mass number of Calcium (Ca)?
2⃣5⃣ How many neutrons does calcium have?
Periodic Table Trends
1⃣ What is the periodic table organized by?
➡ Atomic number (number of protons).
2⃣ How many groups and periods are in the periodic table?
➡ 18 groups (columns) and 7 periods (rows).
3⃣ What do elements in the same group have in common?
➡ They have the same number of valence electrons.
4⃣ What do elements in the same period have in common?
➡ They have the same number of electron shells.
5⃣ What happens to atomic mass as you move down a group?
➡ It increases.
6⃣ What happens to valence electrons as you move across a period (left to right)?
➡ They increase.
Classification of Matter
7⃣ What is matter?
➡ Anything that takes up space and has mass.
8⃣ What are the two main categories of matter?
➡ Pure substances and mixtures.
9⃣ What are the two types of pure substances?
➡ Elements and compounds.
🔟 What is the difference between an element and a compound?
➡ An element is made of only one type of atom, while a compound consists of two or more different elements chemically bonded.
1⃣1⃣ What are the two types of mixtures?
➡ Homogeneous and heterogeneous mixtures.
1⃣2⃣ What is the difference between a homogeneous and a heterogeneous mixture?
➡ Homogeneous mixtures look uniform throughout, while heterogeneous mixtures have visibly different parts.
How to Count Atoms
1⃣3⃣ What does a subscript tell you in a chemical formula?
➡ The number of atoms of the element before it.
1⃣4⃣ What does a coefficient tell you in a chemical formula?
➡ The number of molecules and multiplies all atoms in the formula.
1⃣5⃣ How many hydrogen and oxygen atoms are in 2H₂O?
➡ 4 hydrogen, 2 oxygen.
1⃣6⃣ How many total atoms are in 3CuSO₄?
➡ 3 copper, 3 sulfur, 12 oxygen = 18 total atoms.
1⃣7⃣ In 4Pb(NO₃)₂, how many nitrogen and oxygen atoms are present?
➡ 8 nitrogen, 24 oxygen.