Answer:
The reaction begins and builds up heat. This heat causes the aluminum to melt and float on top of the liquid bromine (which is producing a cloud of vapor because the heat is also boiling it). Wherever the two elements meet, sparks, heat, and light are given off.
Explanation:
be more specific
Answer:
e. 18
Explanation:
A neutral P atom has an atomic number of 15, which means there are 15 protons in the atom. In order to be neutral, the P atom must also have 15 electrons.
The P³⁻ anion has 3 electrons more than the neutral P atom since it has a charge of -3.
Thus, the total number of electrons are 15 + 3 = 18 electrons.
So it could be used in every country(different languages) yet still understood
Explanation:
magnetization
coz it will still have two pols that is north and south pole
Answer: 1.2044 × 10^24
Explanation:
1 mole of calcium is 40 gram
Based on Avogadro's law:
1 mole of any substance has 6.02 x 10^23 atoms, also 1 mole of calcium is 40gram
So, 1 mole of calcium = 6.02 x 10^23 atoms
Also, 1 mole of calcium is 40gram
40 grams of calcium = 6.02 x 10^23 atoms
80.156 grams of calcium = Z atoms
To get the value of Z, cross multiply:
Z atoms x 40 grams = 6.02 x 10^23 atoms x 80.156 grams
40Z = 482.54 x 10^23
Z = (482.54 x 10^23/40)
Z = 12.06 x 10^23
Put result in standard form
Z = 1.206 x 10^24 atoms
Thus, 1.206 x 10^24 atoms of Ca are present in 80.156 grams of Ca
