Which of the following is made up of only mixtures? Please give 1 answer.
A.
Water, Salt, Iron
B.
Air, Blood, Milk
&
с.
Hydrogen, Oxygen, Nitrogen
D.
Iron, Gold, Milk, Copper

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

What’s a special glass that most beakers are made of

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.