what is similar about elements in the same group on the periodic table? A) atomic masses B) atomic numbers C) chemical properties D) number of electrons

If the molecules in the desk in front of you are moving, then why is the desk standing still?

Be sure to answer all parts. Indicate the number of protons, neutrons and electrons in each of these species: (a) 13 N 7 (b) 35 S 16 (c) 63 Cu 29 (d) 89 Sr 38 How many protons are in each isotope? How many neutrons are in each isotope?

The CBR method of flexible pavement design gives an idea about the: A. quality of road-making material B. traffic intensities C. characteristics of soil D. All of the above

What is the speed, in terms of c, of an electromagnetic wave moving through a medium with an index of refraction of 1.27? A 0.79 c B 0.63 c C 0.24 c D 0.27 c

5. Which of the following is the correct definition of mechanical energy

Which best states the author's argument in catching sun rays? no power source is clean, free, and renewable. it costs too much to use solar energy for power. the use of solar energy can cause blackouts in big cities.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, then

What would happen if an electron was added to an atom

Is a stick living, non living or Dead?