C2 Topic 1
Author: , Source:
» C2 Topic 1
An atom of sodium contains 11 protons, 11 electrons and 12 neutrons. The particles in the nucleus of the atom are
C. Protons and neutrons
B. Electrons and neutrons
A. Protons and electrons
An atom of sodium contains 11 protons, 11 electrons and 12 neutrons. The relative mass of this sodium atom is
The electron configurations of carbon and oxygen are: Carbon 2.4, oxygen 2.6. Which row of the table shows the numbers of the groups in the periodic table in which carbon and oxygen are placed ?
A. Carbon in Group 4, Oxygen in Group 2
B. Carbon in Group 2, Oxygen in Group 3
C. Carbon in Group 4, Oxygen in Group 6
D. Carbon in Group 6, Oxygen in Group 4
All atoms of sodium contain the same number of
An atom of sodium contains 11 protons, 11 electrons and 12 neutrons. The electronic configuration of the sodium atom is
The symbol for an atom of magnesium is
Element S exists as two isotopes, mass sumber 10 and 11. A sample of S contains 20% of the isotope with mass number 10 and 80% of the isotope with mass number 11. What is the relative atomic mass of element S ?
The atomic number of chlorine is 17. The symbols for four different atoms, W, X, Y and Z, are shown. Which atoms are isotopes of chlorine ?
A. W and X
B. W and Y
C. X and Z
D. X and Y
Visit our other sites:
Adobe PDF Reader