Oxygen, carbon, hydrogen, and nitrogen are called the building-block elements because they make up the majority of the mass of the human body.

Oxygen, carbon, hydrogen, and nitrogen are called the building-block elements because they make up the majority of the mass of the human body.

The water molecules in this image are best described as being in the liquid state.  

The electron dot symbol for the element phosphorus is represented using ________ dots. 1.

The proper electron-dot symbol for aluminum is ________.

Isotopes of the same element have the same number of ________, ________, but different numbers of ________.

If the density of a 5.25 g blood sample is 1.05 g/mL, what is the volume of the sample, reported in mL?

Which of the following represents an electronic configuration of a noble gas?

When 0.022189 is correctly rounded to two significant figures the number becomes ________.

Which state of matter does not have a definite shape or volume?