Answer: proton =11
Neutron=11
Electron=11
Valence electron=1
Explanation: proton- An element is defined by the number of protons in its nucleus
Neutron- The atomic mass number is the total number of nucleons
Electron- In an atom, the electrons spin around the center, also called the nucleus.
Valence electron- The element has a full innermost electron shell of two electrons and a full shell of eight electrons in the next shell. The third shell, which is the outermost and the valence shell, has only one electron
Answer: Option (b) is the correct answer.
Explanation:
When the cake is baked then due to the heat provided to it there will occur movement of its molecules.
As a result, molecules will gain kinetic energy due to which there will occur collisions between them.
Also, 
Hence, more is the heat provided to the cake more will be the kinetic energy of its molecules due to which when we touch it, it feels hot.
Thus, we can conclude that molecules in the cake are moving faster than molecules in the skin, best explains why the cake feels hot.
Answer:
Option A. The reaction would shift to balance the change.
Explanation:
According to Le Chatelier's principle, if an external constrain such as change in concentration, temperature or pressure is imposed on a chemical system in equilibrium, the equilibrium will shift in order to neutralize the effect.
If the equilibrium of a weak acid dissociation reaction is upset, the equilibrium will shift to balance the change as explained by Le Chatelier's principle.
I just took the test. B. Materials in solution is the wrong answer.
Answer: (a) chromium (b) tungsten (c) tungsten
Explanation:
As we move towards the right in the periodic table, atomic sizes decreases and electronegativity increases accordingly. Similarly, atomic sizes increases down the group. Hence chromium is smaller than tungsten.
However, tungsten is more electronegative than the other metals listed, as a result of this, it also has the highest first ionization energy. Hence the answer above.
