Answer: Mechanical, Heat, Electricity, Light
Fuels, oil, renewable, rate, run, water, wind, hydroelectric, geothermal
Explanation:
Answer:
2HCl → H2 + Cl2 = decomposition
NaF + KBr → NaBr + KF = double replacement
Mg + MnCl2 → Mn + MgCl2 = single replacement
2Na + 02 → Na2O2 = combination
Explanation:
A chemical reaction involves the conversion of one or more substances called REACTANTS into other substances called PRODUCTS. There are different types of reactions depending on how it occurs, they include:
- Combination or synthesis reaction is a type of reaction in which two or more elements combine to form a single product. Example is:
2Na + 02 → Na2O2
- Single replacement is a type of reaction where one element is replaced by another in a compound or molecule. Example below shows that Manganese (Mn) is replaced by magnesium (Mg):
Mg + MnCl2 → Mn + MgCl2
- Double replacement is a type of reaction where two elements are replaced by other elements at a time. Example is:
NaF + KBr → NaBr + KF
- Decomposition is a type of reaction in which one molecule or compound is broken down into two or more products. Example is:
2HCl → H2 + Cl2
Answer:
In brief, electrons in the K⁺ ion occupy three main electron shells. In comparison, electrons in the Na⁺ ion occupy only two main electron shells.
Explanation:
Consider the electron cloud model for the structure of an atom or an ion. The nucleus was very dense and small. It was highly located at the center of the atom or the ion. Electrons occupy most of the space of the atom or ion.
If there are more than one electrons, they would be located in one or more main energy levels. Generally, for two atoms/ions with a similar number of protons, the one with more filled main electron shells would have a larger radius.
Electrons in a neutral Na atom occupy three main energy shells. The outermost shell contains only one electron. That electron would be removed first, such that in the Na⁺ ion, electrons would occupy only two main shells.
Similarly, electrons in a neutral K atom occupy four main energy shells. The outermost shell contains only one electron. That electron would be removed first, such that in the K⁺ ion, electrons would occupy three main shells.
Since there are more occupied electrons shells in K⁺ than in Na⁺, K⁺ would have a larger ionic radius.
Answer:
Alexander Graham Bell
Explanation:
He created the first telephone in 1876.
B, I’m answering so you can give him brainliest