Ranking these elements from the least to the greatest ionization energy is Rb, K, Na, Li. Ionization energy is defined as the amount of energy required to remove the most loosely bound electron, the valence electron, of an isolated atom to form a cation.
Answer:
False, isotopes have different occurrence percentages, so the changes are different.
Explanation:
Hello,
In this case, since it is false that the isotopes of all the elements can be found with the same chance (occurrence) we can consider the following facts:
1. Carbon atom has two major occurring isotopes: C-12 (98.93%) and C-13 (1.07%).
2. Bromine atom has two major occurring isotopes: Br-79 (50.69%) and Br-81 (49.31%).
3. Calcium has four major occurring isotopes: Ca-40 (96.941%), Ca-42 (0.647%), Ca-43 (0.135%) and Ca-44 (2.086%).
Which show us that the chances of finding any isotope differ among elements.
Regards.
Answer:
161 mmHg
Explanation:
Ptotal= PHe +PNe
PHe= Ptotal-PNe
PHe= (600 mm Hg)-(439 mmHg)
PHe=161 mmHg
The valence electrons determine how reactive an element is, and since Sodium and other alkali metals could easily lose an electron, they become very reactive to be stable.
Galaxies are the lump of matter. The shape of major galaxies is spiral shape. Thus, the given statement is false.
<h3>What are the shapes of galaxies?</h3>
The galaxies are the lump of dust and mass, held together by the gravitational force. The galaxies are continuously moving in the universe.
The formation of galaxies is believed to be due to the force of attraction between the components.
The shape of major galaxies is assumed to be spiral-shaped, however, the irregular shape galaxies are also present.
Thus, the given statement about the shape of galaxies is false.
Learn more about galaxies, here:
brainly.com/question/2905713
