Whats more metallic silicon sodium sulfur or thallium

According to the bohr model of the atom, which electron transition would correspond to the shortest wavelength line in the visible emission spectra for hydrogen? hints

Which of the following electron configurations for neutral atoms is correct? Li nitrogen: 1s 2, 2s 2, 2p 3 the third sub-level silicon: 1s 2, 2s 2, 3s 2, 2p 6 3p 2 helium: 1s 1, 1p 1

Which component of the atom has the least mass?

Which of the following indicates that an exothermic reaction has taken place? A. a change in color B. release of heat and/or light energy C. cooling of the surroundings D. absorption of heat by the reaction ... ?

What element's outer shell is not full, is commonly found in air, and can give, take, or share as many as 4 electrons with other elements?

Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant? FeS2 Fe2O3 O2 SO2

What happens in a double replacement reaction

Identify the oxidizing agent and the reducing agent in the following reactions: (i) 8NH3 (g) + 6NO2 (g) = > 7N2 (g) + 12H2O (l) (ii) Zn (s) + AgNO3 (aq) = > Zn (NO3) 2 (aq) + Ag (s) (unbalanced)

Visible light is the A. highest energy level on the electromagnetic spectrum. B. only part of the electromagnetic spectrum that can be seen by humans. C. lowest energy on the electromagnetic spectrum.

Which of the following is likely to be the most valid source of information about pollution?