State the atomicity of the following: (a) Neon (b) Oxygen (c) Chlorine (d) Argon (e) Sulphur Answer: (a) Momoatomic (b) Diatomic (c) Diatomic (d) Monoatomic (e) Polyatomic. Question 16. Then click the add selected questions to a test … State what is meant by the term – ‘chemical formula. Answer: Question 4.

Give two examples each of – (a) Atoms of the same element (b) Atoms of different elements combining to form a molecule.

The radical containing one nitrogen and four hydrogen atoms. Atoms are built up of sub-atomic particles protons, neutrons and electrons.

A measure of the mass of atoms and subatomic particles; is based on the carbon atom. Showing top 8 worksheets in the category - Atomic Structure Grade 7. Differentiate between the following with suitable examples- A basic radical and a acid radical Answer: The positive part is called the basic radical and the negative part is called the acid radical. Write.

An elementary particle of matter – of a group of atoms of different elements behaving as a single unit with charge on the group. Question 8. Answer: Diagram showing basic structure of atom. Atomic Structure. retain the physical & chemical properties of the substance. Number of hydrogen atoms— (a) One atom of hydrogen ‘H’ (b) Two atoms of hydrogen ‘2H’ (c) Three atoms of hydrogen ‘3H’, Combination with elements/radicals — (a) One atom of chlorine ‘Cl’ (b) One radical of sulphate ‘S04’ (c) One atom of nitrogen ‘N’, Compound formed — (a) Hydrogen chloride ‘HC1’ (b) Sulphuric acid ‘H2S04’ (c) Ammonia ‘NH3’, Valency of (a) Chlorine 1 (b) Sulphate 2 (c) Nitrogen 3. A compound maybe consider to have –.

Copper (Cu) can show a valency of 1 and 2. Imaginary path around the nucleus of an atom in which electrons revolve. Displaying top 8 worksheets found for - Periodic Table Chapter 4.

The term for the combining capacity of an element or the number of hydrogen atoms with which it combines or replaces. 3.

Give an example of three elements exhibiting variable valency. Valency of some elements which do not combine with hydrogen then becomes the combining power of the dement with an element whose valency is known. A force between particles in the nucleus of the atom that is effective at the shortest distance and is involved with a process called radioactive decay. Atoms of different elements forming a molecule A molecule is the smallest particle of a pure substance – element or compound. Answer: (a) Atom: It is the smallest particle of an element, which is made up of only one kind of atoms. of atoms of each element of reactant/s = No.

Answer: (a) Atoms of the same element or different elements combine to form a molecule. Test. (b) Molecule: “The smallest particle of a substance which can exist on its own and retains the physical and chemical properties of the substance is called molecule.”, Question 2. An atom or molecule that has a charge because it has gained or lost electrons. N0.

Terms in this set (21) atom.

1. Fill in the blanks with the correct words from the brackets.

There are some elements with more than one valency e.g., iron, copper, tin, lead. Question 3. Showing top 8 worksheets in the category - Atomic Structure Grade 7. A force between all objects and subatomic particles that causes attraction or repulsion because of charge. Match the radicals in List I with their correct names from List II. Flashcards. A non-metal which forms a polyatomic molecule with more than three atoms. If you're seeing this message, it means we're having trouble loading external resources on our website. Subatomic particle in the nucleus that has a positive charge (+). ICSE SolutionsSelina ICSE SolutionsML Aggarwal Solutions, Simplified ChemistryChemistryPhysicsBiologyMathsGeographyHistory & Civics, Question 1.

They are. The sum of Protons + Neutrons in an individual atom.

A measure of the electrical force that occurs whenever the number of protons in the nucleus is different from the number of electrons.

Therefore, the above equation is said to be balanced equation. Question 12. Atom can be destroyed and converted into energy. (a) Helium (He) is considered monoatomic because it contain one atom while hydrogen contains two atom (H2) therefore it considered as diatomic molecule. Draw the basic structure of an atom representing its – (a) Subatomic particles (b) Nucleus (c) Orbits or shells. Atomic Model Answer Key - Displaying top 8 worksheets found for this concept.. Type keywords and hit enter. Chapter 4 atomic structure worksheet answer key pearson.

Name the cation and the anion in the salt – calcium sulphate. (b) Ozone is considered triatomic, but phosphorus a tetratomic molecule. Number of electrons in the outer shell of all elements in a group is the same.

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Question 15. Atom can neither be created nor destroyed. Give a reason why – (a) Helium is considered monoatomic, but hydrogen a diatomic molecule.

Answer: Word equation: Sodium hydroxide + hydrochloric acid -> sodium chloride + water Molecular equation: NaOH + HC1 -> NaCl + H20 No.

chloride, bromide, sulphate, nitrate etc. The smallest particle of matter that retains all the characteristics of an element.

Question 7.

Two or more different non-metals that collectively accept or donate -one or more electrons and become negatitely or positively charged in the process are called. Spell. Answer: Question 13. Na, The negative charged ions are called – anionsg. You can & download or print using the browser document reader options. The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance. Explain the term – ‘valency’. ‘Dilute hydrochloric acid is added to sodium hydroxide’. An atom of nitrogen has seven protons and seven electrons. A region around the nucleus of an atom where electrons are likely to be found. State the main points of contradition of Dalton’s atomic theory by the Modern Atomic Theory.

PLAY. Gravity. Worksheet will open in a new window. A molecule of a compound containing two oxygen atoms and one nitrogen atom. (a) (b) (c) (d) (e) (f) (g) (h).

Particles found within the atom, mainly protons, neutrons, and electrons. Phosphorus (P) can show a valency of 3 and 5. Atoms of the same element that have different mass because they have a different number of neutrons.

Some of the worksheets for this concept are Holt chemistry chapter 4 resource file the periodic table, Periodic table study guide work, Atomic structure chapter 4 work answers, Chapter 4 atomic structure work answers, Elements work name, Work 11, Periodic table review answers, Chapter test the periodic table answer key.

Question 10. Magnesium combines with oxygen forming magnesium oxide MgO Valency of oxygen is two hence valency of magnesium is Two.

Once you find your worksheet, click on pop-out icon or print icon to worksheet to print or download. Question 11. Atoms of different elements combine to form molecules so as to attain chemical stability. Answer: Few examples of elements exhibiting variable valency: Question 14. Test your knowledge of atomic structure! The smallest particle of matter that retains all the characteristics of an element. Hence all elements in the same group of the periodic table have same ‘Valency’ and similar ‘Chemical properties’. Question 6.

7th Grade Science: Atomic Structure Key Terms. State giving reasons the valency of – (a) Chlorine in hydrogen chloride (b) Sulphate in sulphuric acid (c) Nitrogen in ammonia (d) Magnesium in magnesium oxide Answer: Valency of an element or radical is the number of hydrogen atoms which can combine with or displace one atom of the element or radical forming a compound.

With reference to the radical – (a) ammonium (b) bisulphate (c) carbonate – state the group of atoms present in each radical. e.g.

STUDY. of atoms of each element of product/s.

Select the correct answer from A, B, C, D and E for each statement given below: A: Molecule B: Orbits C: Atom D: Valency E: Radical.

In advance of dealing with Atomic Structure Worksheet Answer Key, be sure to understand that Schooling is usually our own factor to a more rewarding tomorrow, and discovering won’t just end as soon as the college bell rings.That will becoming explained, most of us provide you with a number of straightforward however useful posts in addition to web templates manufactured … State what would be its atomic number. Answer: In a salt the positive and negative parts exist as ions.

Draw the basic structure of an atom representing its – (a) Subatomic particles (b) Nucleus (c) Orbits … Matter consists of small indivisible particles called – atoms i.e. Created by. Explain the term – ‘atomicity’. It is the basic unit of matter and is made of three sub-atomic particles (neutrons, protons, and electrons).

Atoms Vs Ions Worksheet Answer Key Unique Fresh Polyatomic Ions ... #363909. ... Atomic Structure Worksheet Grade Lesson Planet Prentice Hall ... #363908.

Give the chemical formula of – (a) sodium hydroxide (b) sodium nitrate (c) sodium bicarbonate (d) sodium sulphite(e) magnesium nitrate (f) ammonium sulphate (g) carbonic acid (h) calcium phosphate Answer: Chemical formula is the representation of a substance by means of symbols.

Some of the worksheets displayed are Atomic structure work, Teacher workbooks, 090412 atomic structure work 1, He sai, Chemistry of matter, Atomic structure lesson, Teaching atomic structure using cooperative learning, 3 06 atomic structure wkst.

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