22 - The Nuclear Atom
22 - The Nuclear Atom
22 - The Nuclear Atom
MAY 2002
22 10 Ne
NOVEMBER 2002
Li? Which line in the table gives the numbers of protons and neutrons in the nuclide 7 3 protons A B C D 3 3 4 7 neutrons 4 7 3 3
MAY 2003
An atom of lithium contains three protons and three electrons. The nucleon number (mass number) of the atom is 7. How many neutrons are there in the atom? A 3 B 4 C 7 D 10
NOVEMBER 2003
4 He? Which line in the table shows the structure of the nucleus of a helium atom 2
electrons A B C D 2 2 0 2
neutrons 2 0 2 2
protons 0 2 2 2
How many electrons orbit around the nucleus of a neutral atom of substance X? A B C D 12 14 26 38
MAY 2004
39 19 K
? 39 D 58
NOVEMBER 2004
MAY 2005
8 In the symbol below, A is the nucleon number and Z is the proton number.
A Z
NOVEMBER 2005
Which particles are found in the nucleus of an atom? A B C D neutrons and protons only neutrons only protons and electrons only protons, electrons and neutrons
MAY 2006
10 The nucleus of a neutral atom of lithium is represented by 7 3 Li. How many protons, electrons and neutrons does the atom contain? protons A B C D 7 3 3 3 electrons 7 7 4 3 neutrons 3 3 4 4
NOVEMBER 2006
11 Which statement is true of all neutral atoms? A B C D The number of electrons equals the number of nucleons. The number of neutrons equals the number of protons. The number of nucleons equals the number of neutrons. The number of protons equals the number of electrons.
nuclide 2
2 1
nuclide 3
3 1
Which of these nuclides have the same number of protons in their nuclei? A B C D 1 and 2 only 2 and 3 only all of them none of them
MAY 2007
13 The data below relates to the nucleus of a particular neutral atom of nitrogen. proton number nucleon number Z=7 A = 17
Which row represents the correct number of neutrons and electrons in this atom? number of neutrons A B C D 10 10 17 17 number of electrons 7 10 7 10
NOVEMBER 2007
14 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium?
n + + n
+ + + n
(not to scale)
n +n+ n n +
n +n+ n n +
MAY 2008
37 17
Cl .
What is true for atoms of this nuclide? A B C D There are 17 nucleons in the nucleus. There are 17 protons in the nucleus. There are 37 electrons in the nucleus. There are 37 neutrons in the nucleus.
NOVEMBER 2008
16 A uranium
238 92 U
What are the new nucleon and proton numbers? nucleon number A B C D 238 236 234 234 proton number 88 90 92 90
MAY 2009
16 7N
17
NOVEMBER 2009
238 92 U ?
18 How many neutrons and how many protons are contained in a nucleus of neutrons A B C D 92 146 146 238 protons 146 92 238 92
MAY 2010
19 The nuclide notation for radium-226 is 226 88 Ra . How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226
NOVEMBER 2010
20 In the atomic model, an atom consists of a central mass, orbited by much smaller particles.
central mass
orbiting particles
What is the name of the central mass and of the orbiting particles? central mass A B C D neutron neutron nucleus nucleus orbiting particles -particles electrons -particles electrons
MAY 2011
21 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium?
n + + n
+ + + n
(not to scale)
n +n+ n n +
n +n+ n n +
NOVEMBER 2011
26 12 X
MAY 2012
23 Which diagram could represent the structure of a neutral atom?
A + B ++ C ++ D ++ + key neutron + proton electron
10