Which of the following is/are non-metals?
a) carbon and sulphur
b) hydrogen and oxygen
c) nitrogen and neon
d) all of these
Which of the following is/are metalloid/s?
a) boron
b) germanium
c) silicon
d) all of these
Most of the non-metals are found in which of the following state?
a) solid
b) liquid
c) gaseous
Which of the following is/are the characteristic/s of metals?
a) shiny appearance
b) high density
c) malleability
d) all of these
Explanation:Chemically, metals have a "sea of electrons" that's loosely flowing around a network of positively-charged ions. When a wave of light hits the metal, the sea of electrons absorb the energy from the light, which makes them vibrate at the atomic level.
Malleability is a material's ability to form thin sheets under pressure by hammering or rolling. Examples of malleable metals are gold, iron, aluminium, copper, silver and lead.
Which of the following is/are the characteristic/s of metals?
a) ductile
b) high melting and boiling point
c) conductor
d) all of these
Explanation:ductility is defined by the degree to which a material can sustain plastic deformation under tensile stress before failure. Ductility is an important consideration in engineering and manufacturing
A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it. In a conductor, electrical charge carriers, usually electrons or ions, move easily from atom to atom when voltage is applied.
Which of the following is/are the characteristic/s of non-metals?
a) dull appearance
b) low density
c) non-malleable
d) all of these
