Elements found in group 1A on the periodic table display which properties?

Changes in the appearance of emission and absorption spectrums are caused by the activities of a. Protons b. electrons c. neutrons d. neutrinos

Design a device that will knock a block of wood a distance of 5 meters. That was the challenge in science class. Ben and Sam designed a pendulum to move the wood block. Their first design moved the block about 1.5 meters.

How do ozone molecules form in the stratosphere?

An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope.

Which of the following would have an electrostatic force of attraction between them? A. Na + and Rb+ B. Cl - and O2- C. Cs + and N3- D. K + and Xe

Balance the following chemical equation: / text{CH}_ 4 + CH 4 + start text, C, H, end text, start subscript, 4, end subscript, plus / text{O}_ 2 / rightarrow 2 →start text, O, end text, start subscript, 2, end subscript, right arrow / text{CO}_2 +

How did the invention of the spectroscope in 1859 change the science of chemistry

Will zinc and sodium carbonate react?

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number