Answer:
Silver
Explanation:
What mass of copper was discharge at the cathode in a cell
Answer:
Group VII
Explanation:
The electronegativity of an element is the tendency of the atoms of that element to attract electrons that are shared with other atoms.
Each element has a different electronegativity from other elements. In particular:
- Electronegativity increases as we move towards the right along the periodic table - this is due to the fact that as we move to the right, the number of valence electrons in the atom increases, and therefore the tendency of the atom to attract more electrons increases more, in order to fill the valence shell. In fact, the most electronegative group is group VII, which is the last but on one on the right (the last group on the right, VIII, is the group containing the noble gases, which do not react at all, so they do not attract electrons)
- Electronegavity also decreases as we move downward along the periodic table - this is because as we move downward, the number of shells and electrons around the atom increase, so all these electrons "shield" the nucleus (which is positively charged, so it is the one attracting the electrons from other atoms), and so the tendency to attract more electrons decreases.
So, the group of element most electronegative is
VII
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. ... Examples of large crystals include snowflakes, diamonds, and table salt.
A. Mg and S. Mg (Magnesium) and S (Sulfur) create MgS (Magnesium Sulfide).
Answer:
Answer is A: a uniform mixture that can’t be separated
Explanation: