Because they have a different number of electrons.
paladium
The electron configuration of platinum is: [Xe]4f145d91.
The electron configuration of Platinum is: 1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d9 6s1
Yes; Platinum 950 it is used solid in the year's before 1920's but their used only 5% of cobalt mix alloy because cobalt it is toxis and can crate cancer in Human body's ! The assay's co. has electronic test that its impossible to see the defferent to know if it is cobalt or platinum! The electronic computer is not 100 % secure... Sincerely !
of course
paladium
Paladium, uranium and platinum
The electron configuration of platinum is: [Xe]4f145d91.
The electron configuration of Platinum is: 1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d9 6s1
It's an electronic cigarette.
The electron configuration of platinum is [Xe]4f14.5d9.6s1.
The electronic configuration by shell for the element Platinum is the same as the filled shells of Xenon (q.v.), plus the following added: 14 electrons in the 4f shell, 9 in the 5d shell, and one in the 6s. Note that protons do not occupy shells in the atom but are bound in the nucleus.
14k Gold Over Dental Gold. Dental gold is between 10K and 20K, frequently 16K. To make it hard enough for dental purposes, the other alloys are often platinum or paladium.
[Xe] 4f14 5d9 6s1
I have one to sell, it´s new.
Yes, it can be done, but the more common thing is to rhodium plate it rather than platinum plate it. Rhodium is more dazzling, has more "bling", than anything else. And it's not prohibitively expensive $20 to $100 probably.
The abbreviated electron configuration for Pt is [Xe] 6s1 4f14 5d9. also, the configuration for Pt2+ ion is [Xe] 4f14 5d8