Which statement below is true All the electrons determine an elements chemical properties.
The location and quantity of valence electrons determines an elements chemical property.
The location of valence electrons is the only thing that determines an elements chemical property
The quantity of valence electrons is the only thing that determines an elements chemical property

The location and quantity of valence electrons determines an elements chemical property.

Explanation:

The location of Valence electrons is in relation to the level and can impact what the atom will react with. The quantity of Electrons can also change what an atom will react with and what it's charge is (for example if an atom has a stable octet in it's second Valence level it generally won't react unless sufficiient heat energy is applied allowing an electron to jump to the third Valence. You can't have all the answers true because they contradict eachother therefore, my answer must be correct.

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answer; i believe that the correct answer is (a) potassium(k)

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