What is the ion with 15 protons and 18 electrons?

The given species contains 15 protons, which suggests its atomic number to be 15. So, the species must be phosphorus (P). As the species contains three extra electrons compared to protons, therefore, the charge on the species should be “-3”. Hence, the given species is an ion, which is represented as P3− .

What element has 15 protons and 18 neutrons?

#15 – Phosphorus – P.

Which element can have an anion with 18 electrons?

calcium
Explanation: Table salt is NaCl , and thus the anion is Cl− , for which Z=17 . And if there are TWO chlorides, the NEUTRAL salt must contain a doubly charge charged cation. And since this cation has 18 electrons, for the parent atom Z=20 , i.e. the element is calcium.

What is the charge on a hypothetical ion with 15 protons and 18 electrons?

3+
Explanation: Protons are positively charged, while electrons are negatively charged. If the ion has 18 protons and 15 electrons, it has 3 more protons than electrons, therefore, the ion has an overall positive charge of 3+.

How many protons and electrons does an oxide anion have?

This means that it has gained two electrons from another element, such as sodium or magnesium. All oxide anions, O2−, have 8 protons and 10 electrons. The number of neutrons depends on the isotope.

How many protons, neutrons and electrons does 17o2 have?

17O2− has 8 protons, 9 neutrons, and 10 electrons. 18O2− has 8 protons, 10 neutrons, and 10 electrons.

Which is bigger anion or a neutral atom?

In general, anions are larger than the corresponding neutral atom, since adding electrons increases the number of electron-electron repulsion interactions that take place. Cations are smaller than the corresponding neutral atoms, since the valence electrons, which are furthest away from the nucleus, are lost.

Are there more electrons than protons in a cation?

In cations, there are fewer electrons than protons, while in anions, there are more electrons than protons. The number of neutrons in a given element, however, can vary. The variants of the same chemical element with a different number of neutrons are called isotopes.