Elements And Compounds Flashcards
What do the particles of a compound consist of?
Two or more atoms.
What are the two different ways atoms can combine?
They form MOLECULES or CRYSTAL LATTICES.
What do molecules always consist of?
Two or more different kinds of atoms or elements.
What do crystal lattices consist of?
Many atoms but are always in a fixed ratio.
What are diatomic molecules?
Molecules consisting of two atoms of the same kind.
Name the most important diatomic molecules.
H2, N2, O2, F2, Cl2, Br2, I2
True or false;
Only the atoms in crystal lattices are combined in a fixed ratio.
False, atoms in molecules and lattices are combined in a fixed ratio.
What are chemical bonds?
The forces that hold atoms together.
How do you work out atomic mass?
No of protons + no of neutrons.
What order are the elements on the periodic table arranged?
In the order of increasing atomic number.
What are the three regions of the periodic table?
Metals, semi-metals, non-metals.
Rows are ……, columns are …….
Rows: horizontal
Columns: vertical
The vertical columns of the periodic table are called……..
Groups.
What happens if molecules or Crystal Lattices are not in a fixed ratio?
Then it is a different compound.
