WorksheetsChemistry
Total questions: 8
Worksheet time: 9mins
An atom has an atomic number of 7 and a mass number of 15. How many neutrons does it have?
7
15
13
8
An atom has 8 protons and 9 neutrons and 10 electrons. What is the mass number?
8
17
27
18
Elements up to Calcium have a maximum of how many electrons in their third shell?
2
4
6
8
An element that has lost or gained an electron is called a/an
ion
compound
atom
element
Which statement accurately describe the atoms of a specific element?
An oxygen, O, atom contains 8 electrons inside the nucleus and 8 neutrons outside the nucleus.
A neon, Ne, atom contains 10 electrons outside the nucleus and 10 protons inside the nucleus.
An oxygen, O, atom contains 8 protons inside the nucleus and 16 neutrons inside the nucleus.
A neon, Ne, atom contains 10 electrons outside the nucleus and 20 protons inside the nucleus.
