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CHEM0502010
Which of the following diagram shows the correct electron arrangement of a chloride ion?
[Proton number of chlorine = 17]
CHEM0502020
The figure above shows the atomic symbol of element Z. Which of the following is correct about the ionic formula and electron arrangement of ion Z?
CHEM0502030
Sodium atoms and sodium ions
CHEM0502040
The diagram shows an electron arrangement of an ion with charge +3. How many protons and electrons does an atom of R contain?
CHEM0502050
The electron arrangement of Y2- ion is 2.8.8 and it has 16 neutrons in its nucleus. Which of the following is most likely the relative atomic mass of Y?
CHEM0502060
Which of the following pair of ions has the same number of electrons?
[Proton Number: H, 1; Li, 3; Na, 11; Mg, 12; S, 16; Cl, 17; Ca, 20]
CHEM0502070
Which of the following atom that has nucleon number and proton number as shown below, would readily form an ion with a charge of +2?
CHEM0502080
P, Q and R are 3 consecutive elements in the periodic table. If R is a noble gas, what is the charge of the ion of element P?
CHEM0502090
The figure shows the arrangement of electrons in a particle. The particle has 7 protons and 7 neutrons. What is the ionic formula of the particle?