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Chemistry 20 general questions Flashcards

1

A characteristic of metallic elements is that

they lose electrons easily
they share electrons with atoms of non-metals
they are pretty
they gain electrons easily

2

The alkali metals can be found in group

1
4
2
7

3

This model represents

a molecule
a neutral atom
an anion
A cation

4

The NH₃ molecule is

an ion
insoluble in water
a non polar molecule
a polar molecule

5

Chemistry is :

best course ever!
really really awesome
the love of my life
awesome

6

VSEPR theory is short for:

valence shell energy probability repulsion theory
very special expert principal replacement
valence shell electron pair retention theory
valence shell electron pair repulsion theory

7

This animation is showing the formation of

a covalent bond
a molecule
an ionic bond
a metallic bond

8

If XF is the correct formula for a metallic fluoride, the formula for its oxide is:

X2O3
XO2
XO
X2O

9

This model represents

boron
lithium
helium
beryllium

10

An exothermic reaction

absorbs energy from the surroundings
releases energy to the surroundings
is cold to touch
has a positive change in energy sign

11

The shape of a H₂O molecule is

tetrahedral
linear
bent
pyramidal

12

Which symbol represents an element in the alkaline earth metals with the highest reactivity?

Z
I
B
N

13

The shape of a NH₃ molecule is

pyramidal
linear
bent
trigonal planar

14

Noble gases are considered inert because they....

have a full valence shell
have unique structure of their nuclei
form noble inert bonds with other elements
have special number of protons and neutrons

15

the dashed line in the diagram represents

a strong primary bond
a hydrogen bond
a weak covalent force
a london dispersion force

Chemistry 20 general questions

Questions 15

Chemistry 20 general questions

Questions 15