PLEASE HELP ME IM IN DIRE NEED OF ASSISTANCE. Describe the properties of alkaline earth metals. Based on their electronic arrangement, explain whether they can exist alone in nature.

Alkaline Earth Metals are the 2nd Group of Metals on the Periodic Table.

Explanation:

Characteristics:

- Shiny

- Reactive

- Low melting and boiling points

- Low density

- 2 valence electrons

Alkaline Earth Metals cannot be found alone in nature since they are highly reactable (If you've ever thrown barium into a lake, it would cause a massive explosion).

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

2b2t

explanation:

2b2t