No student devices needed. Know more
15 questions
The element with the symbol H is:
hydrogen
helium
water
hafnium
The element with the symbol Cu is:
copper.
lead.
chromium.
cobalt.
The element with the symbol Pb is:
potassium.
lead.
iron.
phosphorous.
The element with the symbol Cl is:
carbon.
chlorine.
chromium.
cobalt.
The element with the atomic number 14 is:
silicon.
nitrogen.
carbon.
neon.
The element with atomic number 27 is:
cobalt.
copper.
aluminium.
manganese.
How many protons does vanadium have?
23
51
28
20
How many protons does tin have?
22
52
50
119
Atoms of which of the following elements has the most protons?
iron
sulfur
aluminium
boron
Atoms of which of the following elements have the most protons?
carbon
fluorine
sodium
chlorine
Select the TRUE statement.
Atoms of the same element have the same number of protons.
The mass number of an element is the total number of protons and electrons.
Atoms of the same element have the same number of neutrons.
The mass number of an element is equal to the number of electrons.
An atom has four protons and five neutrons. Its atomic number is:
4
5
9
20
An atom has four protons and five neutrons. Its mass number is:
4
5
9
20
An atom has seventeen electrons and 18 neutrons. Its mass number is:
35
35.45
17
18
An atom has 35 protons, 44 neutrons and 35 electrons. It is an atom of:
bromine.
ruthenium.
gold.
chlorine.
Explore all questions with a free account