HELP ASAP!! GIVING BRAINLIEST AND 50 EXTRA POINTS PER PERSON! :)
1. Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?
2. What properties do metalloids display, and where are they found on the periodic table?
3. Describe the trends in atomic size, ionization energy, and electronegativity from left to right across a period in the periodic table.
4. Choose an alkali metal from the periodic table. What is its electron configuration?
