An atom has a charge of -3 in its orbitals. which statement must be true in order for this atom to have no net charge? there are three positively charged protons outside the nucleus. there are three neutral neutrons in the nucleus. there are three positively charged protons in the nucleus. there are two positively charged protons in the nucleus and one in an orbital.

For this atom to have no net charge there must be three protons in the nucleus.

The electrons in the orbitals carry the negative charge, so there must be three electrons.

The atom is neutral, so there must be three positive charges.

The protons carry the positive charge and are in the nucleus, so there must be three protons.

There are three positively charged protons in the nucleus.

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in an atom in an electrically neutral atom.

Atomic number = Number of electrons = Number of protons

Ions are formed when an atom looses or gain electrons.

When an atom looses its electron, it results in the formation of a positive ion which is known as cation and when an atom gains electron, it results in the formation of a negative ion known as anion.

Thus if an atom has a charge of -3 , it means the atom has gained three electrons and thus for the atom to be electrically neutral, it must contain three protons which are positively charged and present in the nucleus.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.