The vertical (up and down) columns in the Periodic Table are called

The letter, C, is a ... of carbon.

Which of the following are physical properties of metal?

True or False: The reactivity of metals tends to decrease as you move from left to right across the periodic table.

Name this group: These metals are the most reactive.

Name this group: These metals contain familiar metals such as gold, iron, and copper.

Name this group: These metals, located near the nonmetals, are never found uncombined in nature.

Which of the following could be properties of nonmetals?

I am a metal

I am in group 2

I am in period 6

I am…

I am a nonmetal

I am in period 2

I am in group 16/6A

Find an element with similar chemical properties to Barium (Ba).

the basic structural unit of matter

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

the positively charged subatomic particle contained in the nucleus of an atom

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a negatively charged subatomic particle that orbits the nucleus of an atom

a unique number for each element that equals the number of protons in an atom of that element

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

In 1869, Dmitri Mendeleev developed the first periodic table, organizing the elements according to atomic weight. When he ordered the elements, he noticed that there were patterns of repeating properties. The modern periodic table sequences elements from left to right by atomic number.

This was the first person to organize a periodic table.

It stacks the elements in columns according to the number of valence electrons in an atom of the element. Valence electrons are those in the outermost shell of the atom and the ones that participate in reactions. The number of valence electrons is associated with the element’s reactivity. Elements with the same number of valence electrons behave in a similar way in reactions and so are grouped together in the same column on the periodic table.

What does the amount of valance electrons determine about an element?

The maximum number of valence electrons an atom can have is eight, with the exception of helium, which can have only two. In each row, or period, of the periodic table, the last element on the right has the maximum number of valence electrons. Its outermost shell is full, and a new period in which the element on the far left has only one valence electron begins in the next row.

How do you determine how many valance electrons an element has?

In the periodic table, similar elements are arranged in vertical columns called groups. Some of the major groups include Group 1: alkali metals; Group 2: alkaline earth metals; Group 17: halogens; and Group 18: noble gases. Elements within each group have similar properties and characteristic behaviors because of their similar numbers of valence electrons.

In what direction are groups arranged in the periodic table?

Carbon and silicon, however, are examples of non-metals that participate in covalent reactions. Metalloids are located in a zig-zagging line between the two other regions. Metalloids are solid semi-conductors. In contrast to metals and non-metals, metalloids participate in covalent reactions.

Where would you look on the table to find the mettaloids?

The elements in groups 3-12 are called the transition metals. These are similar to the metals in that they are flexible and good conductors but different in that they have unique valence electron structure. They typically form coordinate complexes in which one atom is surrounded by several more in a large complex. Iron, gold, and copper are examples of transition metals.

Which group are the transition metals most like?