Physical Science Reading and Study Workbook Level B Chapter 5 the Periodic Table Answers

A periodic table group is a column, while a periodic table period is a row.

Groups and periods organize elements on the periodic table of the elements. A group is a vertical column down the periodic table, while a period is a horizontal row across the table. Both groups and periods reflect the organization of electrons in atoms. Chemical element atomic number increases equally you move downward a group from height to bottom or beyond a catamenia from left to right.

• An element group is a vertical column on the periodic table. Atoms in a group share the same number of valence electrons.
• An chemical element period is a horizontal row on the periodic tabular array. Atoms in a menses have the same number of electron shells.

Element Groups

Elements within the same grouping share the same number of valence electrons. The number of valence electrons depends on the octet rule. For example, elements in group ane have i valence electron, elements in groups iii-12 accept a variable number of valence electrons, and elements in grouping 17 have seven valence electrons. The lanthanides and actinides, located beneath the chief table, all fit within group 3.

There are 18 element groups. Elements in the aforementioned grouping share common chemic and physical properties. For case, the group 1 elements are all soft, reactive metals. The group 17 elements are highly reactive, colorful nonmetals.

IUPAC Proper noun	Common Name	Family	Old IUPAC	CAS	notes
Grouping 1	alkali metals	lithium family	IA	IA	sometimes excludes hydrogen
Group two	alkaline earth metals	beryllium family	IIA	IIA
Grouping 3	transition metals	scandium family	IIIA	IIIB
Group 4	transition metals	titanium family	IVA	IVB
Group five	transition metals	vanadium family	VA	VB
Grouping half dozen	transition metals	chromium family unit	VIA	VIB
Group 7	transition metals	manganese family	VIIA	VIIB
Group 8	transition metals	iron family	Eight	VIIIB
Group 9	transition metals	cobalt family unit	VIII	VIIIB
Group x	transition metals	nickel family	VIII	VIIIB
Grouping 11	coinage metals	copper family	IB	IB
Group 12	volatile metals	zinc family	IIB	IIB
Grouping 13	icoasagens	boron family	IIIB	IIIA
Group 14	tetrels, crystallogens	carbon family unit	IVB	IVA	tetrels from the Greektetra for iv
Grouping 15	pentels, pnictogens	nitrogen family unit	VB	VA	pentels from the Greekpenta for five
Group sixteen	chalcogens	oxygen family unit	VIB	VIA
Group 17	halogens	fluorine family unit	VIIB	VIIA
Grouping 18	noble gases, aerogens	helium family unit or neon family unit	Group 0	VIIIA

Alternate Group Classification System

Sometimes chemists classify element groups according to shared backdrop, which do not strictly adhere to individual columns. These groups go by the names alkali metals, alkaline globe metals, transition metals, basic metals, nonmetals, halogens, noble gases, lanthanides, and actinides. Under this organisation, hydrogen is a nonmetal. The nonmetals, halogens, and noble gases are all types of nonmetals. The metalloids have properties intermediate between metals and nonmetals. The brine metals, alkali metal earths, lanthanides, actinides, transition metals, and bones metals are all groups of metals.

Element Periods

Elements inside a period share the aforementioned number of electron shells and the same highest unexcited electron free energy level. Elements inside a flow display periodic table trends, moving from left to right, involving atomic and ionic radius, electronegativity, In that location are seven element periods. Some periods contain more elements than others considering the number of included elements depends on the number of electrons allowed in an free energy sublevel. Annotation that the lanthanides are within menses 6 and the actinides are in catamenia 7.

• Menstruation 1: H, He (does non follow the octet dominion)
• Period 2: Li, Exist, B, C, N, O, F, Ne (involves s and p orbitals)
• Period 3: Na, Mg, Al, Si, P, S, Cl, Ar (all have at least ane stable isotope)
• Period 4: M, Ca, Sc, Ti, Five, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr (outset catamenia with d-block elements)
• Catamenia 5: Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sn, Te, I, Xe (aforementioned number of elements as period 4, same general structure, and includes the start exclusively radioactive element, Tc)
• Period half dozen: Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Lead, Bi, Po, At, Rn (first period with f-block elements)
• Menstruation vii: Fr, Ra, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr, Rd, Db, Sg, Bh, Hs, Mt, Ds, Rg, Cn, Nh, Fl, Mc, Lv, Ts, Og (all elements are radioactive; contains heaviest natural elements and many synthesized elements)

References

• Fluck, E. (1988). "New Notations in the Periodic Table" .Pure Appl. Chem. IUPAC.60 (three): 431–436. doi:10.1351/pac198860030431
• Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
• Scerri, E. R. (2007). The periodic table, its story and its significance. Oxford University Printing. ISBN 978-0-19-530573-9.

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Source: https://sciencenotes.org/periodic-table-groups-and-periods/

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