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Protons and electrons are called fundamental particles because they----------
The region around the nucleus where electrons can be located is called?
The following ions have the same electron configuration except
\(_{8}\)O, \(_{12}\)Mg, \(_{13}\)AI, \(_{17}\)CI
An element, Q, contains 69% of\(^{63}\)Q and 31% of \(^{65}\)Q. What is the relative atomic mass of Q?
Potassium trioxonitrate (V) can be obtained from its solution by----------
Which of the following statements is correct about ionization energy? It
Which of the following species has the largest ionic radius
What is the empirical formula of a hydrocarbon containing 0.160 moles of carbon and 0.640 moles of hydrogen
What is the concentration of a solution which contains 0.28g of potassium hydroxide in 100 cm\(^{3}\) of solution [KOH = 56]
Student X titrated 25 cm\(^{3}\) of Na\(_{2}\)CO\(^{3}\) with 0.1 mol dm\(^{-3}\) HCI, using methyl orange as indicator. Student Y carried out the same exercise but used phenolphthalein as an indicator. Which of the following statements about the titration is true?
The 25°C evaporation of a 100 cm\(^{3}\) solution of K\(_{2}\)CO\(_{3}\) to dryness gave 14g of the salt. What is the solubility of K\(_{2}\)CO\(_{3}\) at 25°C? [K\(_{2}\)CO\(_{3}\) = 138]
The Bohr model of the atom proposed the existence of?
How many coulombs of electricity would liberate 1.08g of Ag from a solution of silver salt?
[Ag = 108.0; 1F = 96500 C]
The reactivity of fluorine is high because of
Which of the following half reaction equations represent the reaction at the cathode
Which of the following cell notations represent the diagram?
Which of the following statements about Group VII elements is correct?
Elements with high ionization energies would-------
The collision between ideal gas molecules are considered to be perfectly elastic because
Under which conditions of pressure (p) and temperature (T) would the volume of an inflated ballon increase? When