Which substance can not be decomposed by a chemical change?

A. Ammonia

B. Carbon

C. Methane

D. Water

How did Dmitri Mendeleev deal with elements that had not yet been discovered? He left blanks for them in his periodic table, as he predicted they would be discovered. He created them in his laboratory and placed them in his table.

When mixtures of gaseous h2 and gaseous cl2 react, a product forms that has the same properties regardless of the relative amounts of h2 and cl2 used.

Whatcha group 2 element has the largest ionic radius

What is the smallest part of an element that still retains properties of that element?

Which formula represents a solution? No explanation needed.

Type of ion formed by group 2A elements

When comparing the two elements P and I, the element with the higher first ionization energy is PP When comparing the two elements P and I, the element with the higher first ionization energy is blank based on periodic trends alone.

Internal respiration is the transfer of oxygen and carbon dioxide from the lungs to the tissue cells of the body. True or False

Which element is a metalloid? 1. Al 2. Ar 3. As 4. Aa

You move a 25N object 4 meters. Find the work you did