Why couldn't Mendeleev organize the entire table during his research?

The elements showed no periodic properties.

The atomic mass was unknown at the time.

The atomic number was unknown at the time.

Some elements were undiscovered at the time.

When the waters which once covered Indiana retreated, they left behind a bedrock layer of a.) sandy rock b.) igneous rock c.) sedimentary rock d.) metamorphic rock

What controls traits and inheritance A) gametes B) nucleic acids C) proteins D) temperature

What two subatomic particles are the same in number in any stable element

Why is it important for us to have our lungs inside our bodies? A. to keep them moist B. to make them more eficient C. to increase surface area to keep them moist be

Enzymes are part of the digestion process. Their function is to break down. Amylase is a digestive enzyme secreted and is responsible for breaking down

In which species of animal does sebum eventually become lanolin?

What are some examples and non examples of chemical bonding?

Match the staining techniques with their purpose. A Negative stain such as India ink or Congo red. B The Gram stain C The Ziehl-Neelsen Acid-fast stain D Simple stain with a basic dye E The Schaeffer-Fulton Endospore stain Stain microbes a bright

Sandy puts a paper clip on the table and puts a magnet near the paper clip. The paper clip begins to move. What type of forces are acting on the paper clip?

Which statement is an example of absolute age? 1) Dinosaurs lived a long time ago 2) Trilobites lives before dinosaurs 3) Teachers are old 4) Dinosaurs went extinct 65.5 million years ago