An atom of calcium has 20 protons. How many electrons does it have?

Visual information is processed by which lobe of cerebrum

Which group are zones of the earth's interior correctly arranged in order of increasing average density A. Crust, mantle, inner core, outer core B. Inner core, outer core, mantle, crust C. Crust, mantle, outer core, inner core D.

What is the smallest particle of matter that exhibits and defines the distinctive chemical characteristics of the individual elements

What can cause a frameshift mutation?

Which of the following is an effect of a decrease in the surface-area-to-volume ratio of a cell?

What are the two reasons oxygen and carbon dioxide can move easily across the cell membrane?

Which component of blood is responsible for the formation of blood clots? a. all blood cells b. red blood cells c. myoglobin d. platelets e. white blood cells?

What will the majority of pathogens in food be killed by? a) antimicrobial secretions from the sebaceous glands in the skin b) mucus in the trachea c) acid in the stomach d) nose hairs

What can high levels of salt do to a plant

What is the composition of earths inner and outer core?