lyssamichelle
18.12.2020 •
Chemistry
3 elements that have similar properties
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Ответ:
The elements in the first column of the Periodic Table (other than hydrogen) are known as Group 1A metals, or alkali metals. When you compare the chemical properties of these elements (lithium, sodium, potassium, rubidium, cesium, and francium), what you'll notice is that they are all remarkably similar.
Explanation:
Ответ:
its atomic number is 92 and its atomic mass is 238(92+146).
Explanation:
For example,Silicon has 14 protons and 14 neutrons.its atomic number is 14 and its atomic mass is 28