Atoms

Question 1

whats the smallest particles of elements?

Answer 1

atoms

Question 2

what do atoms bind chemically to form?

Answer 2

molecules

Question 3

what are the smallest particles of compounds?

Answer 3

molecules

Question 4

what are the major subatomic particles?

Answer 4

protons
neutrons
electrons

Question 5

what particle is found in the atom’s dense; central core and have a positive charge?

Answer 5

protons

Question 6

what particle is found in the dense; central core, but has no charge ( is neutral )

Answer 6

neutrons

Question 7

what particle is found outside the aton’s dense, central core and has a negative charge?

Answer 7

electrons

Question 8

does an atom have the same number of positively charged protons and negatively charged electrons or does it not?

Answer 8

they have the same number of positively charged protons ans negatively charged electrons

Question 9

what are the protons and neutrons in the nucleus responsible for?

Answer 9

the mass of an atom

Question 10

what are the electrons in the nucleus responsible for?

Answer 10

the volume of an atom

Question 11

what is the symbol that represents ‘electron’?

Answer 11

e-

Question 12

what is the symbol that represents ‘proton’?

Answer 12

p+

Question 13

what is the symbol that represents ‘neutron’?

Answer 13

n°

Question 14

what does the atomic number of an atom indicate?

Answer 14

the number of protons in the nucleus as well as the number of electrons

Question 15

what does the mass number indicate?

Answer 15

the total mass of the atom, neutrons included.

Question 16

give the name of group 1 in the periodic table,
an example
and a definition of that group.

Answer 16

the group is called the “alkai” metals.
sodium, potassium and lithium are examples.
they are reactive and their oxides dissolve in water to form alkaline solutions.

Question 17

give the name of group 2 in the periodic table,
an example
and a definition of that group.

Answer 17

the group is called the “alkaline earth metals.
magnesium and calcium are examples.
their oxides are alkaline, but only slightly dissolve in water.

Question 18

give the name of group 17 in the periodic table,
an example
and a definition of that group.

Answer 18

the group is called the “halogens”.
chlorine is an example.
they are reactive, poisonous and they have string rasping smells.
they react readily with alkali and alkaline earth metals.

Question 19

give the name of group 18 in the periodic table,
an example
and a definition of that group.

Answer 19

the group is called the “noble gases”.
neon and aro are examples.
the gases do not react with any other element.

Question 20

give the name of group 3 - 13 in the periodic table,
an example
and a definition of that group.

Answer 20

the group is called the “transition metals”.
iron, zinc, silver, gold, copper are examples.
many well-lnown elements are formed in this category / “bridge”.

Question 21

what are the elements on the left of the periodic table are called?

Answer 21

metals

Question 22

what are the elements on the right of the periodic table are called?

Answer 22

non-metals

Question 23

which element is the “lightest”?

Answer 23

hydrogen