True or false? 1. The radius of an atom is 0.1nm 2. Most of the mass is in the shell of the atom. Fill in the table to show the charges and mass of the components of an atom. Name Charge Relative Mass proton square square neutron square square electron square What is the overall charge of an atom? Positive Negative No charge A compound is 2 or more __ , chemically __ Which of the following are compounds? Put a ring round them. oxygen, salt water, magnesium oxide, sodium chloride, nitrogen Why have you circled the ones you have? __ twinkl

## Step1: Determine the radius of an atom### The radius of an atom is typically around . Therefore, the statement is true.## Step2: Determine the mass distribution in an atom### Most of the mass of an atom is concentrated in its nucleus, not in the shell. Therefore, the statement is false.## Step3: Fill in the table for atomic components### The table provided has an error in the relative mass of the electron. The correct relative mass of an electron is very small compared to protons and neutrons. ## Step4: Determine the overall charge of an atom### In a neutral atom, the number of protons equals the number of electrons, resulting in no overall charge.## Step5: Define a compound### A compound is 2 or more elements chemically combined.## Step6: Identify compounds from the list### Compounds are substances composed of two or more different elements chemically combined. From the list: salt water, magnesium oxide, and sodium chloride are compounds.## Step7: Justify the selection of compounds### Salt water is a mixture, not a compound. Magnesium oxide and sodium chloride are compounds because they consist of different elements chemically bonded together.