ch4 draw dot n cross Flashcards

credits: savemyexams.com

1
Q

define covalent bonding

A

sharing of electrons, between, non-metal atoms

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2
Q

for dot and cross drawing place which element at the center

A

whatever has most electrons to share/whatever is lone element in formula

i.e. h2o

Oxygen in middle as it has most electrons to share + lone element (only 1 o)

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3
Q

wat is stable config for electrons

A

2.8.8

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4
Q

what is an ion

A

1.electrically charged atom/group atoms

  1. formed loss/gain of electrons
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5
Q

what are positive and negative ions held tgt by?

A

strong electrostatic forces of attraction

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6
Q

what determines number of covalent bonds between atoms?

A

number of pairs of shared electrons

i.e. 1 pair of shared electrons = 1 covalent bond

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7
Q

Metal X is an element
Can it exsist as X2?

A

NO
all metals in element form exist by themselves

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8
Q

draw struct formula

https://docs.google.com/document/d/1Ep_FO9CxYSFbxmf3Zqg9mgm9NNyt2enpfMDr49gufrU/edit?tab=t.0 page 16

A

https://docs.google.com/document/d/1Ep_FO9CxYSFbxmf3Zqg9mgm9NNyt2enpfMDr49gufrU/edit?tab=t.0 page 16

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9
Q

X -> 2+
Y -> 1-

Why form compound
Xy2

A
  1. X will transfer 2 VALENCE e- -> Y
  2. Y can only take 1 VALENCE e-
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