Elements
How many protons does magnesium have?
12
What is the electron configuration of sodium
2,8,1
Atomic size ______ down a group
increases
What is a positive ion called
cation
A covalent bond occurs between...
two non-metals
What group is copper in?
11
7
Define electronegativity
The ability to attract electrons
Why does an anion have a negative charge?
Because it gains (negatively charged) electrons
A metallic bond occurs between...
two metals
I am an element in group 17 and period 4. How many protons do I have?
35 protons (bromine)
I am an element in period 4, group 2. How many valence electrons do I have?
2
What is the name of least reactive group?
The noble gases
What would be the charge of a flourine ion with a full valence shell?
-1
An ionic bond occurs between...
a metal and a non-metal
What is group 17 called
Halogens
What element has the electron configuration 2,8,4
Silicon
Electronegativity _______ across a period and ________ down a group
Electronegativity increases across a period and decreases down a group
What would the charge of a calcium ion be with a full valence shell?
Which of the following compounds has covalent bonds?
a)NaCl b)MgBr2 c)HCl d)LiF
C
Define electrostatic attraction
Attraction between oppositely charged particles (i.e. protons and electrons)
Why do elements in the same group have similar chemical properties?
Because they have the same number of valence electrons?
Why is potassium more reactive than sodium?
While they have the same number of valence electrons, it has a greater atomic radius. The force of attraction between the protons in the nucleus and the valence electrons is therefore lower because they are further away.
What is the electron configuration for the Mg2+ ion?
2,8
Ionic bonding involves:
a) a sharing of electrons
b) a delocalised 'sea' of electrons
c) donating and accepting electrons?
c