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