A bromine atom has an atomic number of 35 and an atomic mass of 80. What is the structure of this atom?
A. It has a central nucleus composed of 45 protons and 35 neutrons,
surrounded by an electron cloud containing 35 electrons.
O B. It has a central nucleus composed of 35 protons and 80 neutrons,
surrounded by an electron cloud containing 35 electrons.
C. It has a central nucleus composed of 35 protons and 35 neutrons,
surrounded by an electron cloud containing 45 electrons.
D. It has a central nucleus composed of 35 protons and 45 neutrons,
surrounded by an electron cloud containing 35 electrons.

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal

Atoms in a molecule are bonded together by sharing gaining or losing_

Conventional hot-water heaters consist of a tank of water maintained at a fixed temperature. the hot water is to be used when needed. the drawback is that energy is wasted because the tank loses heat when it is not in use, and you can run out of hot water if you use too much. some utility companies are encouraging the use of on-demand water heaters (also known as flash heaters), which consist of heating units to heat the water as you use it. no water tank is involved, so no heat is wasted. a typical household shower flow rate is 2.50 gal/min (9.46 l/min ) with the tap water being heated from 51.0 ˚f (10.6 ˚c) to 120 ˚f (48.9 ˚c) by the on-demand heater.what rate of heat input (either electrical of from gas) is required to operate such a unit, assuming that all the heat goes into the water?