Question

use the periodic table to fill in the chart below for neutral atoms. select any element you wish for blank rows.

element	chemical symbol	number of protons	number of electrons	number of neutrons
	h			0
oxygen				18
		6

Explanation:

Step1: Recall atomic - number and charge - neutrality facts

For a neutral atom, the number of protons is equal to the number of electrons. The atomic number of an element is equal to the number of protons.

Step2: First row

Since the number of electrons is 2, the number of protons is also 2. Looking at the periodic table, the element with atomic number 2 is Helium, symbol He. The most common isotope of helium has 2 neutrons.

Step3: Second row

The chemical symbol is H, which stands for Hydrogen. For a neutral hydrogen atom, the number of protons is 1 and the number of electrons is 1.

Step4: Third row

The element is Oxygen. The chemical symbol of oxygen is O. Oxygen has an atomic number of 8, so the number of protons and electrons in a neutral oxygen atom is 8. Given that the number of neutrons is 18, this is an isotope of oxygen.

Step5: Fourth row

Since the number of protons is 6, the element is Carbon, symbol C. For a neutral carbon atom, the number of electrons is also 6. A common isotope of carbon has 6 neutrons, but we can choose an isotope with a different number of neutrons. Let's assume the most common one with 6 neutrons.

Answer:

Element	Chemical Symbol	Number of Protons	Number of Electrons	Number of Neutrons
Hydrogen	H	1	1	0
Oxygen	O	8	8	18
Carbon	C	6	6	6