chemical Bonding Flashcards
What is Atomic number
tells you the number of protons
how do you calculate mass number
protons + neutrons
what is the charge of a proton
+
what is the charge of an electron
_
what is the charge of an neutron
neutral
how many electrons in the first shell
2
how many electrons in the first shell
2
how many electrons in the second shell
8
how many electrons in the third shell
8
what is the trend in properties of group 1
Group 1 elements are known as Alkali Metals. They are called s-block elements because their highest energy electrons appear in the s subshell. Progressing down group 1, the atomic radius increases due to the extra shell of electrons for each element. Going down the group, the first ionization energy decreases.
what are the trends and properties in group 7
The halogens have low melting points and low boiling points. This is a typical property of non-metals. Fluorine has the lowest melting and boiling points. The melting and boiling points then increase as you go down the group.
what trends are in group 0
the outer shell, apart from Helium which has 2 - stable full outer shell. Unreactive. They are very unreactive. This means they don’t form molecules easily, so elements are found as single atoms.
the trend of reactivity for group 1
The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger as you go down the group. the outer electron gets further from the nucleus as you go down the group.
what is the max number of electrons in the first shell
2
what is volume
lWH
