QUESTIONS AND CORRECT ANSWERS FULL
SOLUTION
●● Proton
Answer: Positively charged particle in nucleus
●● Neutron
Answer: Neutral particle in nucleus
●● Electron
Answer: Negatively charged particle in orbitals
●● Atomic Number
Answer: Number of protons
●● Mass Number
Answer: Protons + neutrons
●● Groups
Answer: Columns with similar properties
, ●● Periods
Answer: Rows showing energy levels
●● Alkali Metals
Answer: Group 1, very reactive
●● Halogens
Answer: Group 17
●● Noble Gases
Answer: Group 18, stable/inert
●● Ionic Bond
Answer: Transfer of electrons (metal + nonmetal)
●● Covalent Bond
Answer: Sharing electrons (nonmetal + nonmetal)
●● Hydrogen Bond
Answer: Weak attraction (water & DNA)