What element has 3 valance electrons and 4 energy levels

The electron affinities of the elements from aluminum to chlorine are - 44, - 120, - 74, - 200.4, and - 384.7 kJ/mol, respectively. Rationalize the trend in these values.

What is a massive plasma ball

In 1896 the French scientists Henri because related discovered

If an element has a half life of one million years, how long will it take to be completely gone

For the equation 3 H2SO4 + 2 Al - > 3 H2 + Al2 (SO4) 3, suppose you wish to prepare 28.7 grams of H2. How many grams of H2SO4 and of Al would you require so that all of the H2SO4 and Al were combined?

What is similar to iodine by chemical characteristics

The arrangement of electrons in the orbitals of an atom

A sample of C3H8 has 4.64 * 1024 H atoms. How many carbon atoms does the sample contain?

What is the value of 200c on a Kelvin scale

Calculate the moles of new H₂ O₂ using the balanced formula below and the average moles of KMnO₄ from calculation #2. The average moles of KMnO₄ is 0.90mol. 2KMnO₄ + 5H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂ Edit: I got 2.