How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?

they have one or two valence electrons, so they cannot lose electrons easily.
they have one or two valence electrons, so they can lose or gain electrons.
they have three to six valence electrons, so they cannot lose electrons easily.
they have three to six valence electrons, so they can lose or gain electrons.

The right answer is D.

Metalloids are semi-metallic chemical elements, whose physical and chemical properties are intermediate between those of metals and non-metals. Most metalloids are semiconductors (unlike metals that are conductors).

Metalloids are gathered in one and the same zone of the periodic table of elements:

boron (B) (3 unpaired electrons)

silicon (Si) (4 unpaired electrons)

germanium (Ge) (4 unpaired electrons)

arsenic (As) (3 unpaired electrons)

antimony (Sb)

tellurium (Te)

polonium (Po)

The answer is D

Explanation:

answer: i would say b.

explanation:

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j