The Periodic Table
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How are elements arranged in the Periodic Table? (inc. atmc. nmbr.)
Elements are arranged by increasing atomic number
What can you predict from an element’s position in the Periodic Table? (prptrs.)
Their properties
What are these also known as; group 1, group 2, group 7 and group 8 elements
Group 1 = alkaline metals Group 2 = alkaline earth metals Group 7 = halogens Group 8 = noble gases
Name the elements found between metals (on the left) and non - metals (on the right) ?
These are metalloids, which have a combination of metallic and non - metallic properties
What is a group in the Periodic Table? (vtcrl. clmn. E w/ smlr. chem. prptrs.)
A vertical column of elements with similar chemical properties
Why do elements in the same group have similar properties? (sme. nmbr. E- in otr. mn. enrgy. lvl.)
They have the same number of electrons in their outer main energy level
What is a period in the Periodic Table? (hrzntl. rw. E)
A horizontal row of elements
How does electronegativity determine if an element is a metal? (M hve. lw. elctrngtvy. - lse. E- esly. frm. pos. ions. whrs. non. M cnnt. - hgh. elctrngtvty. - only. gain.shre. E- - ldng. cvlnt. bnd. frmng)
Metals have low electronegativity so they lose electrons easily forming positive ions, whereas non metals cannot do this due to their high electronegativity so they can only gain/share electrons, leading to covalent bond forming
Why do elements with high electronegativity not form metallic bonds? (atms. atrct. E- strngly. - dnt. lse. E- instd. frm. cvlnt. bnds.)
Their atoms attract electrons strongly, so they do not lose electrons instead they form covalent bonds
Why is silicon classified as a non - metal despite its shiny appearance? (dsnt. cndct. elctrcy. AWA tre. mtl. + h. othr. non. mtlc. prprts.)
It does not conduct electricity as well as a true metal and has other non - metallic properties
Give an example of a metalloid and describe its properties (Slcn. - non. m. lk. shny. + cndcts. elctrcy. - nt. as wll. as mtl.)
Silicon - it is a metalloid that looks shiny and conducts electricity, but not as well as a metal
Why are scandium and zinc not classified as transition metals? (dnt. frm. cmpnds. whch. hve. prtly. flld. d obrtls. - ky. chrctsrc. trnstn. mtls.)
They do not form compounds in which they have partly filled d- orbitals, which is a characteristic of transition metals
How does reactivity change down a group in the s- block? (inc. dwn. grp.)
Reactivity increases going down a group (for metals)
How does reactivity change for non - metals, according to their group? (inc. up grp.)
Reactivity increases going up a group (for non - metals)
Label the necessary information on this periodic table
• Alkaline earth metals • Alkaline metals • Least reactive • Period • Opposite for the halogens • Most reactive • Transition metals • Atomic mass = protons + neutrons • Atomic number = proton number • Diatomic molecules • Noble gases • Halogens