Question

atoms and elements
name royal
grade 8th
1.draw and label two atom models (for two different elements).
2.write a paragraph comparing them. use the term atomic number.
3.include one sentence about the limitation of your model.

Explanation:

Step1: Draw hydrogen and carbon atom models

Hydrogen has 1 proton, 1 electron and usually 0 neutrons. Carbon has 6 protons, 6 neutrons and 6 electrons. Draw a small circle for the nucleus with the number of protons and neutrons marked inside. Draw electron - shells around the nucleus with electrons placed on them. Label the nucleus, protons, neutrons and electrons for each atom.

Step2: Compare the two elements

Hydrogen has an atomic number of 1 as it has 1 proton. Carbon has an atomic number of 6 as it has 6 protons. The atomic number determines the identity of the element. Hydrogen is the simplest and lightest element, while carbon is more complex and is the basis of organic chemistry.

Step3: State the limitation

The model drawn is a simplified Bohr - like model and does not accurately represent the quantum - mechanical nature of electrons, which do not orbit the nucleus in fixed circular paths but exist in probability clouds.

Answer:

1. Hydrogen atom model: A small nucleus with 1 proton (marked as 'p') and no neutrons (or can mark 0 if preferred). One electron (marked as 'e') in the first electron - shell. Carbon atom model: A nucleus with 6 protons and 6 neutrons (marked as 'p' and 'n' respectively). Two electrons in the first electron - shell and four in the second electron - shell.
2. Hydrogen has an atomic number of 1 and is the simplest element. Carbon has an atomic number of 6 and is crucial for organic compounds. The atomic number is the number of protons in the nucleus and defines the element.
3. The model does not account for the quantum - mechanical behavior of electrons.