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The groups in the Periodic Table of elements (the "normal" one) go down the chart. That's because we arranged the elements in increasing order of atomic number, but also in order of valence electron count. It is by looking at the position of an element on the periodic table that we can determine the number of electrons in its outer or valence shell, and we can, thereby, make some good guesses about its chemical properties. As a quick "for instance" here, look at the elements going down the left hand side of the table. These are the Group 1 elements, which are hydrogen, lithium, sodium and on down. And all of them have one lonely electron in their valence band. If you guessed that these elements are reactive and are looking to "hook up" with elements that want to borrow electrons, you'd be right. Further, if you consider the elements that lack only one electron in their valence band from having a full outer shell, which are the Group 17 elements beginning with fluorine, chlorine and the rest of the so-called halogens, you'd guess that these elements are also highly reactive and want to borrow an electron real bad. The last piece of the puzzle is that if you put one atom of a Group 1 element with 1 atom of a Group 17 element, you will get a chemical reaction where the Group 1 element gives up its valence electron to the Group 17 element because that element steals it. The elements form a chemical compound with an ionic bond, and they do so in a one-to-one ratio in every case. That's the whole idea behind the construction of the periodic table of elements. It lets us guess with just a glance what kind of things we can expect of the elements we inspect as regards their chemistry - how they react with other elements. Simple and easy for us, but the table and its construction represent the "coming together" of the life's work of a number of bright and creative scientists. Why not honor them and learn a few things about this handy, clever construct and what it can do for you? If you need a link to a good periodic table, use the one below. It will take you to the Wikipedia periodic table, and what's cool is that each element is a hyperlink to the Wikipedia post on that particular element. What a clever idea.
Wiki User
∙ 15y ago
Wiki User
∙ 16y agoperiods go across, and families/groups go down.
Wiki User
∙ 12y agoGroups on a periodic table go up and down.
Wiki User
∙ 12y agoPeriods are the horizontal rows and families are the vertical columns. Families are identified as groups.
Wiki User
∙ 11y agoAtomic numbers increase from left to right across the table and from top to bottom. The first element, hydrogen is at the top with an atomic number of one.
Wiki User
∙ 13y agoHorizontally
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What is a period in a periodic table?
a row going acrossNOT to be confused with groups or families which go down in columns and have to do with valence electrons
Does the atoms on the periodic table get more dense or less dense as you move down a group?
As you go down the periodic table, the density of elements increase. For metals, going down a group results in more d-orbitals being filled with electrons. This in turn increases the metallic covalent bond strength, causing the atoms to be drawn closer together. Increasing metallic bond strength and increasing atomic weight result in increasing metal densities. For nonmetals, intermolecular forces are mainly involved. As you go down the periodic table on the right side London dispersion forces become stronger because there is a larger separation of partial charges across larger atoms. Increasing intraatomic dipole moments result in increasing Van Der Waals intermolecular forces from which the mass to volume ratio of molecules increases.
What forces act on a frictionless air puck as it moves across a table at constant speed in a straight line?
Gravith pulls it down; table pushes it up.
What happens to friction if the weight of an object is increased?
Friction also increases. Slide your hand across a table. Now try it again, while pressing down hard on the table. More friction with more pressure.
How IS The electronegativity trend relates to the first ionization energy trend?
Electronegativity and first ionization energy both increase going up the Periodic Table.
Do periods go across or down?
Periods go across the periodic table. Groups go down.
How does reading across a period the periodic table compare with reading down a group of the table?
Periods (across the Periodic Table) have increasing Atomic Mass. Groups (down the table) have similar properties and reactive natures.
When you read across a row on the periodic table what happens?
Periods (across the periodic table) have increasing atomic mass. Groups (down the table) have similar properties and reactive natures.
Which direction are families on the periodic table?
groups on the periodic table are the vertical coumns that go up and down. A period on the periodic table are the rows that go horizontal or across.
How does electronegative change going down and across the periodic table?
Electronegativity increases across (left to right) the periodic table and decreases on going down.
What is the difference between a period and a group on the periodic table?
Periods on the periodic table go across and are based on the number of unexcited electrons increasing as you read across. Groups on the periodic table are read down the table and share the same number of valence electrons.
How do scientists use periodic table?
elements down are families or similar traits elements across is groups same proton count
What are some good questions about the periodic table?
Some good questions about periodic table: where are metalloids placed? why group 18 elements are inactive? How many groups and periods are in periodic table? How reactivity changes across and down the group?
How does electronegative change going down and across the table?
Electronegativity increases across (left to right) the periodic table and decreases on going down.
What are groups on the periodic table?
there are alot of groups in the periodic table. to many to mention but each element is grouped into is like chemicals generally down the periodic table. heres a link which will give you all the groups and there properties http://en.wikipedia.org/wiki/Group_%28periodic_table%29
What are periods and groups?
Elements in the periodic table are arranged in periods (rows) and groups (columns). Atomic number increases as you move across a row or period. The period number of an element signifies the highest unexcited energy level for an electron in that element. Elements within a group share several common properties. Groups are elements have the same outer electron arrangement. The outer electrons are called valence electrons.
What is the difference between groups and families on the periodic table?
families determine the energy level of an element and groups determine their properties.
