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This among the following elements has the tendency to form covalent compounds:
(1) Ba
(2) Be
(3) Mg
(4) Ca
Ans: Be
Q. Explain about Neutral and Amphoteric oxides? Neutral oxides have neither acidic nor basic properties and when dissolved in water, they give neutral solutions, e.g., CO, N
all about isotopes
HYDROGEN Hydrogen is the natural element in the Universe and is a major constituent of stars. It is relatively much less common on Earth but nevertheless forms nearly 1% by mass
density of gas is 2.86 ltr.the gas may be-
Energy of electron of hydrogen atom in second Bohr orbit is: (1)-5.44x10 -19 j (2)- 5.44x10 -19 kj (3)-5.44x10 -19 cal
diagonal relationship and anomalous behaviour of the each element of the periodic table
Q. What is scientific law and theory? A theory is a description that has been supported by many experiments. Theories declare broad principles of nature. Even though theories a
Substitution reactions Replacement of a molecule or set/group of the substrate by any another type of atom or group is termed as substitution reactions. Examples :
How many types of colloidal system? and which are they?
Cast iron is not appreciably malleable at any temperature as cast. The carbon in cast irons may be present in the form of iron carbide or free graphite. White cast iron contains ce
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