Question

An element X placed in the 1st group and 4th period of the periodic table, burns in the presence of
another element Y which belongs to 16th group and 2nd period to form a compound Z which is soluble
in water.
a. Identify the element X and Y
b. Write the electronic configuration of X and Y.
c. Write the formula of the compound formed between X and Y by criss -cross method and
mention the nature of the compound.
d. How many groups and periods does modern periodic table have?

Answer 1

Which process involves developing an approximation of the monetary resources needed to complete project activities a estimate costs b control costs c determine budget d plan cost management?

Answer 2

Answer:

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A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers.