A part of the periodic table is shown 11
Na
19
K
37
Rb
12
Mg
20
Ca
38
Sr
Which of the following elements has the highest atomic mass (amu)?

a Sodium (Na)
b Calcium (Ca)
c Strontium (Sr)
d Potassium (K)

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

What is the most common form of matter in the universe

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .