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Atomic Structure
Test Description: Tan Kai, Shawn 3A1 25
Instructions: Answer all questions to get your test result.
1) Which of the following properties is the same for the isotopes of an element?
A
Number of neutrons
B
Density
C
Atomic Number
D
Mass
2) Which of the following elements is a negative ion?
A
Proton no. 8 Neutron no. 8 Electron no. 10
B
Proton no. 17 Neutron no. 18 Electron no. 17
C
Proton no. 12 Neutron no. 12 Electron no. 12
D
Proton no. 11 Neutron no. 12 Electron no. 10
3) An atom has an atomic number of 11. Which of the following statements is true?
A
It has an electronic configuration of a noble gas
B
It forms a positive ion of +1 by gaining one electron
C
It forms a negative ion of -1 by gaining one electron
D
It forms a positive ion of +1 by losing one electron
4) Which of the following atoms A, B, C or D would form an ion with a charge of +1?
A
Atom D; Mass no. 24; Atomic no. 12
B
Atom C; Mass no. 23; Atomic no. 1
C
Atom A; Mass no. 12; Atomic no. 6
D
Atom B; Mass no. 16; Atomic no. 8
5) The atomic weight of carbon( atomic number 6) is 12. How many electrons does it have?
A
12
B
6
C
0
D
4
6) Which of the following statements is not true about atoms?
A
The no. of protons must be the same as the no. of electron
B
The nucleus must always contain protons and neutrons
C
The neutron no. can be deduced by using mass and proton no.
D
The electrons will not be found in the nucleus
7) A beryllium atom has 4 protons,5 neutrons,4 electrons. What is the mass no. of this atom?
A
13
B
9
C
5
D
4
8) The two main parts of an atom are its:
A
Electrons and neutrons
B
Protons and electrons
C
Nucleus and protons
D
Nucleus and electron energy levels
9) What is the charge of an ion that has 20 protons and 18 electrons?
A
-2
B
+1
C
-1
D
+2
10) An isotope of cadmium has an atomic no. of 48 and a mass no. of 112. This cadmium ion has:
A
48 protons, 112 neutrons, 48 electrons
B
64 protons, 48 neutrons, 64 electrons
C
48 protons, 64 neutrons, 48 electrons
D
112 protons, 48 neutrons, 112 electrons
*select an answer for all questions
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