Which atom in the ground state has an outermost electron with the most energy?(1) Cs (3) Li(2) K (4) Na

1 answer:

8 0

The answer is Cs, no. 2.
Cesium (Cs) is an element which has an outermost electron with most energy in the ground state.
Cesium (Cs), Lithium (Li), Potassium (K), and Sodium (Na) are elements which belong to the group 1 family, the alkali metals. Each has a valance of 1 and wants to release/ lose this e- (electron) to be isoelectronic with the nearest noble gas. Based on the periodic trends, an atom’s radii will raise going down a group.

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What pressure is exerted on the bottom of a 0.500-m-wide by 0.900-m-long gas tank that can hold 50.0 kg of gasoline by the weigh

Natasha_Volkova [10]

Answer:

1088.89 Pa

Explanation:

According to the Newton's second law of motion:-

$Force=Mass\times Acceleration$

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Acceleration = g = 9.81 m/s²

So,

$Force=50.0\times 9.8\ kgm/s^2$

Force = 490 N

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