In ionic bonds, atoms GAIN/LOSE/SHARE electrons?
gain and lose
Which atoms are stable? Why?
The Noble Gases (group 18) because they have a FULL valence shell.
Are all atoms stable?
No, most atoms are UNSTABLE
Why do atoms form compounds?
To become stable by gaining, loosing or sharing electrons
In covalent bonds, atoms GAIN/LOSE/SHARE electrons.
share
What are the 3 types of chemical bonds?
Ionic bonds, covalent bonds and metallic bonds
What do we call this compound? CaS
calcium sulphide
An ionic bond is formed because of _________ attraction between an anion and a cation.
ELECTRICAL attraction
When a neutral atoms gains 1 electron, it becomes a NEGATIVE ion. WHY?
Because now it has more electrons that protons
In covalent bonds, atoms share electrons from WHICH shell?
valence shell or the outer shell
Ionic bonds happen betweem METAL/NON-METAL and METAL/NON-METAL elements.
metal and non-metal
What is a chemical compound?
A substance formed by 2 or more atoms chemically joined together
What is the name of group 1 of the periodic table?
Alkali Metals
What type of bond will form between Br and I?
covalent
Can covalent bonds form between 2 atoms of the SAME element?
Yes, for example CL-CL
What is the name of group 17 of the periodic table?
Halogens
When a neutral atoms gains 1 electron, it becomes a POSITIVE/NEGATIVE ion?
negative
What do we call this compound? KF
potassium flouride
Covalent bonds happen between METAL/NON-METAL and METAL/NON-METAL elements.
non-metal and non-metal elements
What type of bond will form between N and O?
covalent
Nitrogen is in group 15. How many covalent bonds can it form?
up to 3