| What are lanthanides? | Rare earth metals |
| What are lanthanides? | Rare earth metals |
| Who grouped the elements in triads with similar properties? | Dobereiner |
| Who said that every eighth element beginning from any element resembles the first element in it's physical and chemical properties? | Newlands |
| Who stated that the properties of elements are periodic functions of their atomic masses? | Mendeleev |
| Who put forth the Modern Periodic table? | Henry Moseley |
| What was the defect in mendeleev's periodic table? | Could not explain the positions of rare earth metals and isotopes |
| What is the modern periodic table based on? | Atomic number |
| Niels Bohr gave what? | The long (extended) form of the modern periodic table |
| What are the most reactive metals? | Alkali metals |
| Which type of elements react with water to give out Hydrogen and their alkaline solutions? | Alkalis |
| What is an alkali? | Bases soluble in water |
| What group do halogens belong to? | Group 17 |
| What are the most reactive non metals known as? | halogens |
| Give the typical meaning of the word "halogen" | salt formers |
| What do halogens react with to form salts? | Alkali metals or alkaline earth metals |
| Which element of group 1 is NOT an alkali metal? | Hydrogen |
| Who forms weaker alkalis with water than group 1 elements? | Alkaline earth metals |
| What are elements present in the group 3-12 known as? | Transition elements |
| Which elements have their two outermost shells incomplete? | Transition elements |
| What are chalcogens? | ore forming elements |
| What does a period represent? | Number o f shells |
| What does a group represent? | Number of valence electrons |
| What are lanthanides? | Rare earth metals |
| What are actinides? | Radioactive |
| Elements who summarise the properties of their respective groups are called? | Typical elements |
| What is the cause of periodicity? | recurrence of similar electronic configuration |
| Which elements have same number of valence electrons? | Elements of the same group |
| What happens to number of shells down a group? | They increase successfully |
| What happens to number of shells while moving across a period? | The number of shells remain the same |
| What happens to number of valence electrons while moving across a period? | They increase successfully bitch |
| How are elements arranged in a periodic table? | Increasing atomic number |
| What is nuclear charge? | Positive charge present in the atom/protons/electrons |
| What does an increase in nuclear charge do to the size of an atom? | Increases the size of an atom |
| Why does atomic size increase down a group? | Because number of shells increase |
| Why does atomic size decrease across a period? | Because nuclear charge increases |
| Are the atoms of inert gases bigger or smaller than the halogens? | Bigger |
| Why are the atoms of inert gases bigger? | They have maximum electron repulsion |
| Is the size of an inert gas atom bigger than the alkali metal of the same group? | No , go f*ck yourself. :) |
| What is the size of a cation from the parent atom? | always smaller |
| What is the size of an anion compared to the parent atom? | always bigger |
| What are atoms having the same electronic configuration called? | Isoelectronic ions |
| Elements which have a tendency to lose electrons are called? | metals |
| What effect does atomic size have on metallic character? | Increases metallic character |
| What effect does nuclear charge have on metallic character? | Decreases metallic character |
| Elements which lose electrons to complete their octet are? | reducing agents |
| What happens to metallic character as we move down a group? | Metallic character increases |
| Give one example of a radioactive element | Francium |
| What happens to metallic character across a period? | Metallic character decreases |
| How many valence electrons do non metals usually have? | 5 , 6 or 7 |
| What happens to non metallic character down a group | Non metallic character decreases dumbo |
| What happens to non metallic character across a period? | Non metallic character increases |
| What happens to oxides across a period? | decreasing basic nature and finally become acidic |
| Which is the least reactive metal in the third period? | Silicon |
| Most reactive metal? | Francium |
| Most reactive non metal? | Fluorine |
| What happens to melting and boiling points of metals going down a group? | decreases |
| What happens to melting and boiling points of non metals going down a group? | increases |
| Energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion? | Ionization potential |
| What is the SI unit of Ionization Potential? | kilojoule per mole |
| How does greater atomic size affect ionization enthalpy? | it decreases |
| How does greater nuclear charge affect ionization enthalpy? | it increases |
| What happens to ionization energy across a period? | It increases |
| What happens to ionization energy down a group? | It decreases :) |
| Why is Ionization energy of Francium not known? | cuz it's a radioactive bitch |
| Who has lowest ionization energy? | Caesium |
| Amount of energy released while converting an atom to anion by addition of electrons | Electron affinity |
| What effect does greater atomic size have on electron affinity? | it decreases |
| what effect does nuclear charge have on electron affinity? | It increases with an increase |
| What happens to electron affinity across a period? | it increases |
| What happens to electron affinity down a group? | It decreases |
| Tendency of an atom to attract the shared pair of electrons towards itself is called? | electronegativity |
| Who devised the most widely used scale of electronegativity? | some Linus freaking pauling |
| What happens to electronegativity across a period? | It increases |
| What happens to electronegativity down a group? | it decreases |
| Metalloids combine with oxygen to form ____ oxides | amphoteric |
