Chemistry 🔬 Flashcards
What does the group number indicate when drawing atoms?
The group number indicated the number of valence electrons.
What does the period number indicate when drawing atoms?
The period number indicate the number of electron rings on an atom.
How do you find the number of protons in an atom?
The number of protons is equal to the atomic number?
How do you find the number of electrons in an atom?
The number of electron is equal to the atomic number.
How do you find the number of neutrons in an atom?
The number of neutrons is equal to the atomic mass subtract the atomic number.
What is an Ionic bond?
When valence electrons move form one atom to another to make a full octet?
What are the steps to ionic bonds?
1- Draw Lewis dot diagram
2- determine the charge
3- swap the charge numbers
What are covalent bonds?
Atoms that share atoms or molecules.
ALWAYS non-metals + non-metals
Naming covalent compounds?
Word 1- the central atom, atom with the least amount
Word 2- the other atom + IDE
Word 3- use préfixes if needed.
Naming Polyatomic ions.
1- identify the base name (cation)
2- Name the ion (use chart)
3- make sure the charge is neutral
What reaction does two elements become one?
Composition
What reaction does one element become two?
Decomposition
What reaction does one element trade places with a pair?
Single displacement
What reaction does two elements trade places?
Double displacement
If a solution has a ph of less than 7 it is…
Acidic
