Identify whether the following statement is true or false.Mendeleev was searching for a pattern in the elements that would group the ones with similar properties.TrueFalseI'm not sure

Identify whether the following statement is true or false.Mendeleev grouped similar elements together in horizontal rows but the modern periodic table groups them in vertical columns.

True or false? Elements within a group show similar chemical properties to each other.

Mendeleev wanted to find a pattern amongst all the elements that were known at his time. State which two features he used to organise the elements.

Which statements are correct about a group? Select all that apply.Each member of the group has the identical electron configuration in the outer shell.The elements in each group have similar chemical properties.The elements in each group have identical physical properties.The atomic number of each element increases by 7 down through the group.

Mendeleev classified elements inSix periods and seven groupsEight periods and eight groupsSeven periods and eight groupsEight periods and seven groups