Metalloid
Explanation:
If an element is lustrous, brittle and a semi-conductor, it is best classified as a metalloid.
Metalloids shares attributes of metals and non-metals.
- They are often described as semi-metals as they do not share the full properties that makes a metal a metal.
- Metalloids are lustrous but not malleable like metals.
- They do not conduct electricity but they do so on certain conditions.
- Examples are silicon, germanium, boron, arsenic e.t.c
- They are usually found in the middle of the periodic table.
- They are not readily alloyed with metals.
Learn more:
Metalloid brainly.com/question/3023499
#learnwithBrainly
Answer:The other isotope, 65Cu, has an abundance of 30.91%. Calculate the average atomic mass of copper. 63Cu 0.6909 x 63= 43.5267 65Cu 0.3091 x 65= +20.0915
Explanation:Nov 17, 2015 — The average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes. Now, weighted average ... avg. atomic mass=∑i(isotopei×abundancei). The more ... of the element. In your case, you know that rubidium has two stable isotopes.
The answer is true!!!!!!!!!!!!!!!!!!!!!!!
Answer:
The pH of the solution is 4.282
Explanation:
First we need to write the dissociation reaction
⇄
Also, we need to prepare I C E table
⇄
I 0.078 0 0
C - x +x +x
E 0.078 - x x x
Thus, pH= - Log[H₃O⁺]
The equilibrium concentration of H₃O⁺ = x
So, we solve for x
Solving this quadratic equation; x = 5.2232 x 10⁻⁵ M
pH = - Log[H₃O⁺]
pH = - Log[5.2232 x 10⁻⁵]
pH = 4.282 (in 3 decimal places)
Therefore, the pH of the solution is 4.282