EduNinjaKnow what is meant by the terms atomic number, mass number, isotopes and relative atomic mass (Ar)
The diagram shows the particles in an atom of an element.
Give the mass number of this atom.
Complete the sentence about isotopes.
Isotopes are atoms that have the same number of ................................ but have a different number of ................................ .
The diagram shows the particles in the atom of an element.
What is the mass number of this atom?
4
5
9
13
What is the atomic number of this atom?
4
5
9
13
Identify the element that contains this atom.
This question is about chemical elements.
Use the Periodic Table to help you answer this question.
Identify the element whose atoms contain 14 protons.
The diagram shows an atom of an element.
Atom diagram
There are two isotopes of this element.
Give one way, in terms of sub-atomic particles, that these isotopes are the same and one way that they are different.
same ................................
different ................................
Use the Periodic Table to help you answer this question.
Name the element with a relative atomic mass of 11
Determine the number of neutrons in a phosphorus atom with mass number 31
The diagram shows the electronic configuration of an atom of an element.
Give the number of protons in this atom.
The diagram represents an atom of an element.
Use numbers from the box to complete the table.
You may use each number once, more than once or not at all.
2 4 5 9 10
| Property | Value |
|---|---|
| Atomic number of this atom | ................................ |
| Mass number of this atom | ................................ |
| Period number of this element | ................................ |
| Number of electrons in the 2+ ion formed from this atom | ................................ |
In terms of sub-atomic particles, state a similarity and a difference for isotopes of the same element.
similarity ................................
difference ................................
The diagram shows the sub-atomic particles in an atom of an element.
Give the name of this element.
The table gives information about four different species, W, X, Y and Z.
Give the mass number of W .
Explain why Y and Z are isotopes of the same element.
This question is about Group 7, the halogens.
What is the total number of electrons in one fluorine atom?
7
9
10
19