Material found in air, water, or soil that is harmful to humans or other organisms

37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom? (1) The first ionization energy decreases and the electronegativity decreases.

Cells in many-celled organisms. A - all look at B - all have the same structure C - are usually specialized D - are the same size in every part of the organism

How can you tell if something is a mixture of a pure substance

A highly polar molecule that contains a weak bond between a hydrogen atom and another element would be

Was is an intial observation

The sedimentary rock formed when water deposits tiny particles of clay in very thin flat layers is called? a. gymsum b. shale c. limestone d. calcite

What change into velocity

Would you expect the h atoms to remain bonded to each other, or would the molecule fall apart?

Conductivity in a metal results from the metal atoms having (1) high electronegativity (2) high ionization energy (3) highly mobile protons in the nucleus (4) highly mobile electrons in the valence shell

All atoms are neutral. explain the basis of this fact