The PH of water is 7 because it contains an equal amount of h and oh- ions.
Seafloor spreading is the answer to your question.
atoms are made of 3 types of sub atomic particles; electrons, protons and neutrons
Of these particles, electrons are involved in the chemical reactions.
Therefore chemical properties of the element are determined by the electrons, and that too mostly the valence electrons. Valence electrons are the electrons in the outermost energy shell.
Atoms with same number of valence electrons have similar chemical properties. atoms having same number of valence electrons are classified into groups.
So elements of the same group have same number of valence electrons, hence similar chemical properties
Ca has 2 valence electrons so it belongs to group 2. Of the given elements
only Mg belongs to group 2. Therefore Mg has the most common properties with Ca
Answer:
B. They all have molecules in motion.
Explanation:
All substances have molecules in motion, this is because all substances have an average kinetic energy (temperature) of over 0 K.
