In, 1937 Lawrence, in operating his cyclotron, bombarded a molybdenum-96 foil with deuterium ions (2h), producing for the first time an element not found in nature. He was initially unaware that the radioactivity produced by the "bombarded foil" was not from molybdenum but from a new, artificial element. It was his cooperation with Italian-American physicist <span>Emilio Segrè </span>that allowed the new element to be discovered. The answer is Technetium: Tc
Answer:
a
Explanation:
because I said so and I think it's right
Answer: The law of conservation of mass is reffering to the fact that energy cannot be created or destroyed. So when you speak about atoms not being created or destroyed it is the same thing. Unless you're talking about an atomic bomb where the atoms are split.
Answer:
They both have Four electron shells
Explanation:
- The periodic table arranges elements into columns called groups and rows called periods.
- Elements in the same group share similar chemical and physical properties.
- For example, elements in group 1 called alkali metals have similar properties. They include sodium, lithium, and potassium among others.
- On the other hand elements in the same period have the same number of energy levels or electron shells. For example, elements in period 4 have four energy levels.