Question

you can draw the structures of some common atoms by knowing their atomic number and number of neutrons. using the information below, draw an atom of each substance. remember to put the correct number of electrons in each energy level.

substance atomic number number of neutrons
helium 2 2
lithium 3 4
nitrogen 7 7
fluorine 9 10
neon 10 10

Explanation:

Step1: Recall electron - shell rules

Electrons fill the first shell (K - shell) first, which can hold a maximum of 2 electrons. Then they fill the second shell (L - shell) which can hold a maximum of 8 electrons.

Step2: Analyze Helium

Helium has an atomic number of 2. So, it has 2 electrons. These 2 electrons fill the first energy level (K - shell). The structure has a nucleus with 2 protons and 2 neutrons, and 2 electrons in the first energy level.

Step3: Analyze Lithium

Lithium has an atomic number of 3. So, it has 3 electrons. 2 electrons fill the first energy level (K - shell) and 1 electron fills the second energy level (L - shell). The structure has a nucleus with 3 protons and 4 neutrons, 2 electrons in the first energy level and 1 electron in the second energy level.

Step4: Analyze Nitrogen

Nitrogen has an atomic number of 7. So, it has 7 electrons. 2 electrons fill the first energy level (K - shell) and 5 electrons fill the second energy level (L - shell). The structure has a nucleus with 7 protons and 7 neutrons, 2 electrons in the first energy level and 5 electrons in the second energy level.

Step5: Analyze Fluorine

Fluorine has an atomic number of 9. So, it has 9 electrons. 2 electrons fill the first energy level (K - shell) and 7 electrons fill the second energy level (L - shell). The structure has a nucleus with 9 protons and 10 neutrons, 2 electrons in the first energy level and 7 electrons in the second energy level.

Step6: Analyze Neon

Neon has an atomic number of 10. So, it has 10 electrons. 2 electrons fill the first energy level (K - shell) and 8 electrons fill the second energy level (L - shell). The structure has a nucleus with 10 protons and 10 neutrons, 2 electrons in the first energy level and 8 electrons in the second energy level.

Answer:

For Helium: Nucleus with 2 protons and 2 neutrons, 2 electrons in first energy level.
For Lithium: Nucleus with 3 protons and 4 neutrons, 2 electrons in first energy level, 1 electron in second energy level.
For Nitrogen: Nucleus with 7 protons and 7 neutrons, 2 electrons in first energy level, 5 electrons in second energy level.
For Fluorine: Nucleus with 9 protons and 10 neutrons, 2 electrons in first energy level, 7 electrons in second energy level.
For Neon: Nucleus with 10 protons and 10 neutrons, 2 electrons in first energy level, 8 electrons in second energy level.