PS - CHAPTER 4 - PERIODIC TABLE

Who developed the system of chemical symbols using one to two letters of an element's Latin name?

Jacob Berzelius

Which scientist noticed that elements came in groups of three with similar properties known as “triads”?

Johann Döbereiner

Who developed the law of octaves, stating that the properties of every eighth element are similar when arranged by atomic mass?

John Newlands

Who is famous for leaving blank spaces on their table for predicted but undiscovered elements?

Dmitri Mendeleev

Whose discoveries led to organizing the modern periodic table by atomic number rather than atomic mass?

Henry Mosley

How many total groups and periods are there on the periodic table?

18 groups

7 periods

What is a column of elements with similar valence electron arrangements called?

Family/Group

What is another name for a row in the periodic table?

Period/Series

Classify each of the following elements as a metal, nonmetal, or metalloid:

A. Beryllium

B. Krypton

C. Arsenic

A. Metal

B. Nonmetal

C. Metalloid

What are the elements in group one called?

bonus: how many valence electrons do they have?

Alkali metals

bonus: one

Where are metals generally located on the periodic table compared to nonmetals?

Left side

~ nonmetals on the right