Which of the following elements is a group 1 metal?
a. he
b. f
c. ca
d. cs

the correct answer is Cesium "Cs"

Explanation:

Group 1 metals means alkali metals.

The electronic configuration of alkali metals is such that they have only one valence electron in the outer most shell.

The following are the elements of first group

a) Lithium

b) sodium

c) Potassium

d) Rubidium

e) Cesium

so the correct answer is Cesium "Cs"

A) He : This is noble gas

B) F : This is halogen

C) Ca : This is alkaline earth metal.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

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