Which element is in group 2 and period 7 of the periodic table

What is the value of the charge on an ion with 28 protons and 26 electrons?

There are several different models that represent compounds. One type of model is shown. A large black sphere connected to 4 small blue spheres by 4 grey sticks.

In which state of matter are water molecules measured as having a comparatively high temperature

What percentage of boys Chose walking

Which property decreases when the element in group 17 are considered in order of increasing atomic number

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?

Is feeling warmth from a fireplace convection, radiation, or conduction?

Which part of Dalton's atomic theory was disproved by Thomson's experiment? O Atoms cannot be created, destroyed, or divided into smaller particles. O Chemical reactions occur when atoms combine, separate, or rearrange.

Of the following, which is most likely to result after a farmer sprays his crops with pesticides? A. The crops die. B. The insect population increases. C. The soil dries up and blows away. D. A neighbor's well tests positive for pesticides.

How many liters does the following number of atoms of helium take up? 9.42x10^22 atoms He