Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
E-Mail*
You must login to ask question.
Username or email*
Password*
Atomic Number decides the chemical properties of elements.
Halogens
Noble gases are not fit into metal or non-metal group.
Mendeléev’s Periodic Table contains: vertical columns called ‘groups’ horizontal rows called ‘periods’
Sc and Ge
Fill in the blanks: The basis of modern Periodic table is _______________
Atomic Number decides the chemical properties of elements.
Atomic Number decides the chemical properties of elements.
See lessFill in the blanks: Group 17 elements are called ______________
Halogens
Halogens
See lessWhy do you think the noble gases are placed in a separate group?
Noble gases are not fit into metal or non-metal group.
Noble gases are not fit into metal or non-metal group.
See lessWhat were the criteria used by Mendeleev in creating his Periodic Table?
Mendeléev’s Periodic Table contains: vertical columns called ‘groups’ horizontal rows called ‘periods’
Mendeléev’s Periodic Table contains:
See lessvertical columns called ‘groups’
horizontal rows called ‘periods’
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
Sc and Ge
Sc and Ge
See less