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Paper 1 | Objectives | 47 Questions
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Paper 1 | Objectives
Christian Religious Knowledge/Education/Studies (CRS/CRK/CRE)
Which of the following instruments is used in detecting the presence of radiation?
A. Cathode ray tube
B. Geiger-Muller counter
C. Mass spectrometer
D. X-ray tube
The molecule which has a linear shape is
The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is
An atom of an element X gains two electrons. The symbol of the ion formed is
A. X +
B. X 2+
C. X 2-
D. X -
Which of the following statements is correct?
A. Atomic size decreases down the group
B. Atomic size increases across the period
C. Anions are smaller than the parent atom
D. Cations are smaller than the parent atom
Which of the following arrangements represents the correct order of electronic energy level?
A. 1s 2p 2s 3p 3s 3d 4s
B. 1s 2s 2p 3s 3p 3d 4s
C. 1s 2s 2p 3s 3p 4s 3d
D. 1s 2s 3s 2p 3p 4s 3d
The element with electron configuration 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\) belongs to
A. s-block period 3, group 1
B. p-block, period 3, group 2
C. s-block, period 3, group 3
D. p-block, period 3, group 3
In the periodic table all elements within the same group have the same
A. number of neutrons
B. number of valence electrons
C. number of isotopes
D. atomic number
Which of the following halogens is liquid at room temperature?
Rare gases are stable because they
A. are chemically active
B. contain equal number of protons and neutrons
C. contain more electrons than protons
D. have octet structures
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