Atoms & Periodic Table
This number tells you how many protons are in an atom.
What is the atomic number?
A cation forms when an atom does this.
What is “loses electrons”?
An acid reacting with a base produces salt and this.
What is water?
Lewis dot diagrams help chemists show this specific part of an atom involved in bonding.
What are valence electrons involved in bonding?
You read the volume in a burette from the bottom of this curved shape.
What is the meniscus?
Electrons in the outermost shell are called this.
What are valence electrons?
Ionic bonds form between these two types of elements.
What are metals and non-metals?
A precipitation reaction produces this type of product.
What is an insoluble solid?
Draw the Lewis dot diagram for oxygen (students’ task).
What is 6 valence electrons around O?
The role of an indicator in titration is to show this moment.
What is the endpoint (reaction is complete)?
An atom with 11 protons is which element?
What is sodium?
Covalent bonds form when atoms do this with their electrons.
What is “share electrons”?
Balance this equation:
H₂ + O₂ → H₂O
What is 2H₂ + O₂ → 2H₂O?
This diatomic molecule has a triple bond in its Lewis structure.
What is N₂?
These results are close to each other, even if not close to the true value.
What is precision?
This diagram shows electrons arranged in shells around the nucleus.
What is a Bohr diagram?
This type of ion has more electrons than protons.
What is an anion?
In a double displacement reaction, the ions do this with each other.
What is “swap partners”?
In the Lewis structure of O₂, this many electrons are shared between the oxygen atoms.
What is 4 electrons / a double bond?
To calculate an average titre, you only average these types of values.
What are concordant titres (usually within 0.10 mL)?
These two subatomic particles added together give you the atomic mass.
What are protons and neutrons?
The electron configuration for aluminium
What is 2, 8, 3?
Mixing MgCl₂(aq) and Na₂SO₄(aq) produces this precipitate.
What is MgSO₄(s)?
Draw the Lewis dot diagram for CO2
Teacher Check
A student records the following titres: 24.90 mL, 25.10 mL, 24.88 mL.
Explain whether these are considered precise
What is “because the volumes are very close to one another”?