Question

when using the periodic table the element name always matches the letter of the element symbol
false
true
adding protons or neutrons to the nucleus of an element can change the chemical and physical properties of the element
true
false
ions are a product of an atom
gaining or losing neutrons
gaining or losing a nucleus
gaining or losing electrons
gaining or losing protons

Explanation:

1. In the periodic - table, not all element names match the first letter of their symbols. For example, iron has the symbol Fe.
2. Adding protons changes the element itself (as the atomic number changes), and adding neutrons creates isotopes, both of which can change chemical and physical properties.
3. Ions are formed when an atom gains or loses electrons.

Answer:

1. False
2. True
3. Gaining or losing electrons