An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?

In the formula for water what does the subscript 2 indicate

Identify the indicated sets of protons as unrelated homotopic

What is the coordination number of the central metal ion in [co (c2o4) 2 (oh) 2] 3 - ?

Yousef measured the height of each seedling on day 1 and day 7. These are his results. Group Seedling Increase in height/mm A no water 6.5 0.5 0.5 0.5 5.5 B 2 cm water Height of seedling/mm Day 1 Day 7 - 6.0 5.5 6.0 6.0 5.5 7.5 6.0 8.0 6.0 8.5 6.0 9.

Which term defines the ability of a solute to dissolve within a solvent? A. solubility B. fissionability C. absorbability D. saturability

Which of the following is not a projectile? a. a satellite b. a throw ball c. a ball on the ground d. a soaring arrow

A change of state requires the addition or removal of heat energy. True False

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

How long does a hydrogen bond last in water

If the body temperature of a person is recorded as 37°c, what is the person's body temperature in k? round your answer to the nearest whole number.