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Andhra Pradesh SSC (Class 10) Periodic Classification of Elements — practice questions — page 2

Explore 98 free Periodic Classification of Elements questions in Andhra Pradesh SSC (Class 10) Science and Technology. Open each question or exercise to read its content, reference answers and available explanation.

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Periodic Classification of Elements questions and exercises with answers

Showing questions 31–60 of 98.

Across period 3 from Na to Cl, which property shows a continuous increase?Read the answer and worked solution →Pop only the alkali metalsRead the answer and worked solution →Pick the higher ionisation energyRead the answer and worked solution →Sort trends across a periodRead the answer and worked solution →Sort: down a group, what happens? (CBSE Cl 10)Read the answer and worked solution →Match the group to its property (CBSE Cl 10)Read the answer and worked solution →Who put forward the law of triads?Read the answer and worked solution →Newlands' law of octaves stated that every:Read the answer and worked solution →Mendeleev arranged elements primarily in order of:Read the answer and worked solution →The modern periodic table is based on:Read the answer and worked solution →How many periods does the modern periodic table have?Read the answer and worked solution →What is the valency of an element with electronic configuration 2, 8, 3?Read the answer and worked solution →Atomic radius generally DECREASES across a period because:Read the answer and worked solution →Which is the most reactive metal?Read the answer and worked solution →Which property INCREASES on going down a group?Read the answer and worked solution →Which element has the highest electronegativity in the periodic table?Read the answer and worked solution →How does metallic character change down a group?Read the answer and worked solution →Sodium (atomic number 11) belongs to which group and period?Read the answer and worked solution →Which of the following has the largest atomic radius?Read the answer and worked solution →Which trend is followed by ionisation energy across a period?Read the answer and worked solution →Which set lists representative elements (s-block and p-block) only?Read the answer and worked solution →Which pair shows the diagonal relationship in the periodic table?Read the answer and worked solution →Across period 3, which element forms the most acidic oxide?Read the answer and worked solution →Why is potassium more reactive than sodium?Read the answer and worked solution →How does the size of a cation compare with its parent atom?Read the answer and worked solution →Which is the most non-metallic element of group 16?Read the answer and worked solution →Why are the noble gases very stable chemically?Read the answer and worked solution →Mendeleev predicted the existence of an element he called eka-silicon, later identified as:Read the answer and worked solution →A chemical bond formed by complete transfer of electrons is called:Read the answer and worked solution →A covalent bond is formed by:Read the answer and worked solution →

Worked practice questions

Across period 3 from Na to Cl, which property shows a continuous increase?

  1. Atomic radius
  2. Metallic character
  3. Number of shells
  4. Electronegativity
Show answer and solution

Correct answer: D. Electronegativity

1. Electronegativity is the tendency to attract shared electrons. 2. Across period 3 atomic size shrinks because protons grow faster than added electrons. 3. Smaller atoms pull shared pairs more tightly. 4. So electronegativity grows steadily from Na to Cl. 5. Atomic radius and metallic character both decrease across the period. 6. The shell count stays the same in a single period. 7. Hence the only property that rises continuously is electronegativity. _Source: Selina Concise Chemistry ICSE Class 10, Ch 1 'Periodic Table' (aplustopper.com extract)_

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Pop only the alkali metals

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Other terms
  1. Magnesium
  2. Calcium
  3. Iron
  4. Aluminium
Matching terms
  1. Lithium
  2. Sodium
  3. Potassium
  4. Rubidium
  5. Caesium
  6. Francium
Instructions
Element names drift past. Pop only the ones from the alkali metal family and skip the rest.

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Pick the higher ionisation energy

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Questions
  1. A
    Helium (He, ~2372 kJ/mol)
    B
    Hydrogen (H, ~1312 kJ/mol)
    Higher value
    Helium (He, ~2372 kJ/mol)
  2. A
    Neon (Ne, ~2081 kJ/mol)
    B
    Fluorine (F, ~1681 kJ/mol)
    Higher value
    Neon (Ne, ~2081 kJ/mol)
  3. A
    Sodium (Na, ~496 kJ/mol)
    B
    Lithium (Li, ~520 kJ/mol)
    Higher value
    Lithium (Li, ~520 kJ/mol)
  4. A
    Nitrogen (N, ~1402 kJ/mol)
    B
    Oxygen (O, ~1314 kJ/mol)
    Higher value
    Nitrogen (N, ~1402 kJ/mol)
Instructions
Two elements appear each round. Tap the one whose ionisation energy is higher.

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