Question

Mendeleev noticed that if he organized the elements by atomic weight certain patterns emerged. for instance, elements in the same group (family) appeared to have the same

Answer 1

Properties. Each family has it's own properties, features, and even things like color, malleability, or conductivity.

Answer 2

Elements it the same group have the same properties as listed below.

Step-by-step explanation:

1) The same number of electrons in their valence shell

2) The same chemical properties

3) Atomic size

4) Ionic size

5) Ionization potential

6) Electropositivity increases

7) Electronegativity decreases

8) Electron gain enthalpy