year 10 chemistry Flashcards
1
Q
the mass number is made up of?
A
neutrons and protons
2
Q
what is an atomic structure?
A
Atoms consist of an extremely small, positively charged nucleus surrounded by a cloud of negatively charged electrons.
3
Q
how many protons does carbon have?
A
6
4
Q
what is the closest shell to the nucleus called?
A
lowest energy level
5
Q
what are periods on the periodic table?
A
A period on the periodic table is a row of chemical elements.
6
Q
what is the atomic mass on a periodic table?
A
the ratio of the average mass of the atom to the unified atomic mass unit
7
Q
what is the atomic number on the periodic table?
A
the number of protons in the nucleus
8
Q
what is the valence?
A
the number of chemical bonds that each atom of a given chemical element typically forms.
