Worksheetsatomic structure (chem o lvl)
Total questions: 13
Worksheet time: 8mins
Which of the following statements is true for all atoms
number of protons = numbers of electrons
number of protons = number of neutrons
number of neutrons = number of electrons
number of neutrons = number of protons + electrons
Which of the following lists particles that have equal and opposite charges
a proton and a neutron
a neutron and an electron
a neutron and a hydrogen nucleus
a proton and an electron
Which statement about ²⁄₁H and ¹⁄₁H is true?
Both have one neutron and one proton
Both have only protons but no neutrons
²⁄₁H has two neutrons but ¹⁄₁H has one neutron
²⁄₁H has one neutron but ¹⁄₁H has no neutrons
Which one of the following shows the number of protons, neutrons and electrons present in an atom of sodium ²³⁄₁₁Na?
A
B
C
D
An atom of one isotope of phosphorus has 15 protons and 16 neutrons.
Which of the following describes a possible isotope?
A
B
C
D
Fill in the blanks:
Isotopes have the same (a) properties but slightly different physical properties
An atom of element X has the symbol ⁷⁄₃X. Which statement about element X is correct?
In one atom, the number of protons + the numbers of neutrons is 10
In one atom, the number of protons + the numbers of electrons is 6
It is in Group III of the Periodic Table
It is in Group VII of the Periodic Table
The diagram shows the structure of an atom. Which diagram shows the structure of an isotope of this atom?
What is the name given to atoms of the same element which have different masses?
(a)
Two gallium atoms are represented as follows:
(i) ⁶⁹⁄₃₁Ga
and
(ii) ⁷¹⁄₃₁Ga.
Atom (i): 37 Atom (ii): 41
Atom (i): 36 Atom (ii): 44
Atom (i): 38 Atom (ii): 40
Atom (i): 39 Atom (ii): 42
Complete the table below to show the number of protons, neutrons and electrons of the respective atom.
A: 34
B: 73
A: 36
B: 75
A: 35
B: 74
A: 32
B: 77
Explain how one can obtain the number of neutrons of any of these elements from the information in the above table.
Subtracting the atomic number from the mass number
Adding the numbers of protons and electrons
Subtracting the neutrons from the atomic number
The arrangement of electrons in an atom is represented using their ________ configuration or ________ structure
(a)
