would you predict that Sc is metallic? Explain the basis for your predicition by using what you know about its location in the Periodic Table.

How does the number of valence electrons change as one moves from left to right across any group on the periodic table? A C D It increases by one. It decreases by one. It stays the same. The relationship cannot be predicted.

Define electron cloud.

8. What is the relationship between an electron configuration and an orbital diagram? Draw the orbital diagram of Silicon as and use it to clearly show how it relates to the electron configuration of Silicon. -

Give the full electron configurations of:     As

write the (a) full and (b) condensed (noble gas) electron configurations of strontium ion.(c) which noble gas is strontium ion isoelectronic with ?

Provide Proper IUPAC names Provide Proper IUPAL name CH3 No2 (H3 OF HOCCC H2)3COH gletaric acid]

The elements in the periodic table are grouped by similar chemical properties, which come from the similarities in the arrangement of their electrons. These electron arrangements can be expressed as generic outer electron configurations, i.e., the electron configuration outside the noble gas core, for all periods in a group using n instead of a specific number. Similarly, the generic Lewis dot structures for each group can be drawn using X to represent a generic element symbol. Match each generic electron arrangement to the appropriate periodic group number. Note that not all of the electron arrangements must be used. 1A (1) X. ns² (n − 1) d¹ - ns² (n − 1) dª ns²np³ 2A (2) •X• ns³ ns2 3A (13) .x. ns² (n − 1) d² ns² (n − 1) d³ - 4A (14) Answer Bank ns² np6 5A (15) ns² np³ X ns²np ns²np¹ 6A (16) ns¹ ns² np² 7A (17) X ns² (n − 1) dº - ns² (n − 1) dº 8A (18)

Given the information in the following table for the Group 7 elements, which of the following would not be a predicted property of technetium (Tc, Z = 43)? Element Manganese (Mn) Technetium (TC) Rhenium (Re) Melting Point (°C) 1244 ???? 3180 AH vap (kJ/mol) 221 ???? 704 The AH vap of Tc is approximately 585 kJ/mol. The melting point of Tc is around 2200 °C. The highest neutral oxide of Tc is Tc₂07. The density of Tc is likely around 25.0 g/cm³. Density (g/cm³) 7.43 ???? 21.0 Highest Neutral Oxide Formed Mn₂07 ???? Re207

Give the valance electron configuration for Niobium.