The bond formed when two electrons that are shared between two atoms are donated by only one of the atoms is
- A. covalent
- B. dative
- C. ionic
- D. metalic
Which of the following elements can conveniently be placed in two groups in the periodic table ?
- A. Carbon
- B. Copper
- C. Hydrogen
- D. Oxygen
Chlorine, bromine and iodine belong to the same group and
- A. are gaseous at room temperature.
- B. form white precipitate with AgNO3(aq)
- C. react violently with hydrogen without heating
- D. react with alkali
Which of the following arrangements is in order of increasing metallic property?
- A. Li < Na< k
- B. Na < Li < K
- C. K
- D. K < Li < Na
Which of the following hydrohalic acids is the weakest?
- A. HBr
- B. HCI
- C. HF
- D. HI
The energy change that accompanies the addition of an electron to an isolated gaseous atom is
- A. bond energy
- B. electronegativity
- C. electron affinity
- D. ionization energy
Which of the following elements would produce coloured ions in aqueous solution?
- A. Calcium
- B. lron
- C. Magnesium
- D. Sodium
Rare gases are stable because they
- A. contain equal number of protons and neutrons
- B. contain more electrons than protons
- C. are chemically active
- D. have octet structure
An element with the electron configuration of 1s 22s 22p 6 would have a combining power of
- A. o
- B. 2
- C. 6
- D. 8
Which of the following ions has the electron configuration 2,8,8?
- A. Na+
- B. Mg2+
- C. F-
- D. CI-
What type of reaction is represented by the following equation?\(\frac{2}{1}\)D\(\frac{3}{1}\)H → \(\frac{4}{4}\)He + \(\frac{1}{0}\)n + energy
- A. Nuclear fission
- B. Nuclar fusion
- C. Radioactive decay
- D. Spontaneous decay
Which of the following electrons configurations correctly represents an inert element?
- A. 1s22s22p4
- B. 1s22s22p63s2
- C. 1s22s22p63s23p4
- D. 1s22s22p6