Answer is: calcium and strontium have same number of valence electrons.
Beryllium, magnesium,calcium and strontium are alkaline earth metals. The elements have very similar properties. Alkaline earth metals have in common an outer s- electron shell (two electrons).
Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²; calcium has two valence electrons (4s²).
Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.
Strontium electron configuration: ₃₈Sr 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s²; two valence electrons is 5s² orbital.
Evaporation because water absorbs the heat so the particles have more energy and can break away from bonds holding them together (turn to gas)
Answer:
Explanation:
Dear student, there is no sufficient information to calculate the empirical formula but we will explain what Empirical Formula is all about.
An empirical formula is made up of symbols that denote the elements in a complex, such as H for hydrogen and O for oxygen, as well as subscripts that indicate the number of atoms from each constituent element.
The empirical formula is the atoms in a complex with the lowest whole number ratio. The precise number of atoms in a single molecule is not necessarily shown.
<span>A molecule consists of two or more atoms that are chemically bonded. together. Atoms ... In a nuclear change new materials are formed by changes ... In one isotope called Deuterion the nucleus contains a proton and a neutron. ... It has 3 protons and 4 neutrons in its nucleus and 3 electrons. Two of .... Yttrium 39 2 8 18 9 2.</span><span>
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