https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/law-of-conservation-of-mass 2024-06-04T09:29:17.69709831Z ବସ୍ତୁତ୍ବ ସଂରକ୍ଷଣ ନିୟମ What happens to mass in a chemical reaction? Does it change or remain the same? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw ବସ୍ତୁତ୍ବ ସଂରକ୍ଷଣ ନିୟମ What happens to mass in a chemical reaction? Does it change or remain the same? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/L1_ZxaW0Pjo.mp4/L1_ZxaW0Pjo.mp4 180 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/law-of-definite-proportions 2024-06-04T09:29:17.69709831Z ସ୍ଥିରାନୁପାତ ନିୟମ | If we take 10L of water or 10,000L of water, will the ratio of the mass of oxygen to hydrogen in both the samples be same or different? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw ସ୍ଥିରାନୁପାତ ନିୟମ | If we take 10L of water or 10,000L of water, will the ratio of the mass of oxygen to hydrogen in both the samples be same or different? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/IQSSwU6S3D4.mp4/IQSSwU6S3D4.mp4 139 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/e/laws-of-chemical-combination 2024-06-04T09:29:17.69709831Z ରାସାୟନିକ ସଂଯୋଗର ନିୟମ । ଆସ, ରାସାୟନିକ ସଂଯୋଗର ନିୟମ ଗୁଡ଼ିକୁ ବୁଝିବା ପାଇଁ କିଛି ସମସ୍ୟା ସମାଧାନ କରିବା। Aanchal Arora exercise https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/elements-and-atoms 2024-06-04T09:29:17.69709831Z ମୌଳିକ ଏବଂ ପରମାଣୁ | Elements are pure substances with specific properties. Atoms are the smallest units of elements that still retain the element's properties. Atoms contain electrons, neutrons, and protons. Each element is defined by the number of protons in its nucleus. Sal Khan video https://cdn.kastatic.org/googleusercontent/zfLHeNHjPfEhSYfKtZLu6Ft_uFg2p_L9gALjUyfahbjdBzZbrDLxrg-rk_mrsUBBVIKs44ALBBI1Gv8cm2O_Ppa05g ମୌଳିକ ଏବଂ ପରମାଣୁ | Elements are pure substances with specific properties. Atoms are the smallest units of elements that still retain the element's properties. Atoms contain electrons, neutrons, and protons. Each element is defined by the number of protons in its nucleus. https://cdn.kastatic.org/ka-youtube-converted/p1_m6O9Olhc.mp4/p1_m6O9Olhc.mp4 789 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/naming-ions-and-ionic-compounds 2024-06-04T09:29:17.69709831Z ଆୟନ ଓ ଆୟନିକ ଯୌଗିକଗୁଡ଼ିକର ନାମକରଣ Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. For example, KCl, an ionic compound that contains K⁺ and Cl⁻ ions, is named potassium chloride. video https://cdn.kastatic.org/googleusercontent/F9fhxeAzbl5tczOC_KxI5UnfufCJyVdO9qXgu-Rltqyf00aQlHvx_6KjnT27peERAhBSPipQTUL_5Zz001iLpgdW ଆୟନ ଓ ଆୟନିକ ଯୌଗିକଗୁଡ଼ିକର ନାମକରଣ Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. For example, KCl, an ionic compound that contains K⁺ and Cl⁻ ions, is named potassium chloride. https://cdn.kastatic.org/ka-youtube-converted/2er4Ujgv9HQ.mp4/2er4Ujgv9HQ.mp4 237 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/naming-ionic-compound-with-polyvalent-ion 2024-06-04T09:29:17.69709831Z ବହୁଯୋଜ୍ଯତା ଆୟନ ଥିବା ଆୟନିକ ଯୌଗିକର ନାମକରଣ Naming ionic compounds that contain polyvalent ions, using example of cobalt (III) sulfide. video https://cdn.kastatic.org/googleusercontent/sxisshpuJ9O_2ZZjQvIjFGtLso07gFMAoyk38AXaNrm0p6xisnDoq1wep1D35GeS_-3QwEcEQ-Q_Wx31ltj-MCoE ବହୁଯୋଜ୍ଯତା ଆୟନ ଥିବା ଆୟନିକ ଯୌଗିକର ନାମକରଣ Naming ionic compounds that contain polyvalent ions, using example of cobalt (III) sulfide. https://cdn.kastatic.org/ka-youtube-converted/Tvj_sqz4Rxs.mp4/Tvj_sqz4Rxs.mp4 242 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/e/naming-ionic-compounds 2026-03-30T15:44:04.338332951Z ଆୟନିକ ଯୌଗିକଗୁଡ଼ିକର ନାମକରଣ ସୂତ୍ର ଦିଆଗଲେ ଆୟନିକ ଯୌଗିକଗୁଡ଼ିକର ନାମକରଣ ଅଭ୍ୟାସ କର । Yuki exercise https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/formula-for-ionic-compounds 2024-06-04T09:29:17.69709831Z କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଏକ ଆୟନିକ ଯୌଗିକର ସୂତ୍ର ଖୋଜିବା To find the formula of an ionic compound, first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge. Finally, combine the two ions to form an electrically neutral compound. In this video, we'll walk through this process for the ionic compound calcium bromide. Sal Khan video https://cdn.kastatic.org/googleusercontent/uFzvQna9JIfbEJWn_g8kE_QLI6lwhccLp5EDsU3uvCI7eDoPW8Ot2aHw_IqS9s7G-M4WbFPK58RpSVckceItSlSJ କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଏକ ଆୟନିକ ଯୌଗିକର ସୂତ୍ର ଖୋଜିବା To find the formula of an ionic compound, first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge. Finally, combine the two ions to form an electrically neutral compound. In this video, we'll walk through this process for the ionic compound calcium bromide. https://cdn.kastatic.org/ka-youtube-converted/11qumk-02NI.mp4/11qumk-02NI.mp4 179 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/worked-example-formula-for-an-ionic-compound 2024-06-04T09:29:17.69709831Z କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଏକ ଆୟନିକ ଯୌଗିକର ସୂତ୍ର Let's understand how to write the formula for ionic compounds! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଏକ ଆୟନିକ ଯୌଗିକର ସୂତ୍ର Let's understand how to write the formula for ionic compounds! https://cdn.kastatic.org/ka-youtube-converted/2F2ENoK9zSQ.mp4/2F2ENoK9zSQ.mp4 211 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/e/find-the-formula-for-ionic-compounds 2025-04-02T07:40:03.547978066Z ଆୟନିକ ଯୌଗିକଗୁଡ଼ିକର ସଂକେତ ଖୋଜ ଆୟନିକ ଯୌଗିକର ନାମ ଦିଆଗଲେ ତାହାର ସଙ୍କେତ ଖୋଜିବା ଅଭ୍ୟାସ କର । Yuki exercise https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/e/predicting-the-formula-of-the-given-ionic-compound 2025-04-10T10:02:29.790622892Z ଦିଆଯାଇଥିବା ଯୌଗିକର ସଙ୍କେତ ଅନୁମାନ କରିବା ଦିଆଯାଇଥିବା ଆୟନିକ୍ ଯୌଗିକର ସଠିକ୍ ସଙ୍କେତ ଚିହ୍ନିବା ପାଇଁ ଆସନ୍ତୁ କିଛି ସମସ୍ୟା ସମାଧାନ କରିବା । Aanchal Arora exercise https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/the-mole-and-avogadro-s-number 2024-06-04T09:29:17.69709831Z ମୋଲ୍ ଏବଂ ଆଭୋଗାଡ୍ରୋର ସଂଖ୍ୟା One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/6088ce39-bf63-44b0-8918-4702d0c7bf46_1280_720_base.png ମୋଲ୍ ଏବଂ ଆଭୋଗାଡ୍ରୋର ସଂଖ୍ୟା One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles. https://cdn.kastatic.org/ka-youtube-converted/xiN_xl7FZN4.mp4/xiN_xl7FZN4.mp4 537 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/worked-example-calculating-molecular-weight 2024-06-04T09:29:17.69709831Z କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଆଣବିକ ବସ୍ତୁତ୍ବ ନିର୍ଣ୍ଣୟ କରିବା Let's understand how to calculate the molecular weight of a molecule! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଆଣବିକ ବସ୍ତୁତ୍ବ ନିର୍ଣ୍ଣୟ କରିବା Let's understand how to calculate the molecular weight of a molecule! https://cdn.kastatic.org/ka-youtube-converted/Qt3HIO99fLc.mp4/Qt3HIO99fLc.mp4 208 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/v/worked-example-calculating-molar-mass-and-number-of-moles 2024-06-04T09:29:17.69709831Z କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଆଣବିକ ବସ୍ତୁତ୍ବ ଏବଂ ମୋଲର ସଂଖ୍ୟା ନିର୍ଣ୍ଣୟ କରିବା The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance's molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/a85d2606-e7fa-4f30-be42-548a6905d16d_1280_720_base.png କାର୍ଯ୍ୟକାରୀ ଉଦାହରଣ: ଆଣବିକ ବସ୍ତୁତ୍ବ ଏବଂ ମୋଲର ସଂଖ୍ୟା ନିର୍ଣ୍ଣୟ କରିବା The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance's molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance. https://cdn.kastatic.org/ka-youtube-converted/hr35oeVpThc.mp4/hr35oeVpThc.mp4 349 ପରମାଣୁ ଏବଂ ଅଣୁ https://or.khanacademy.org/science/revision-odisha-class-9-science/xb979aa6db51c2cdc:week-1/xb979aa6db51c2cdc:atoms-and-molecules/e/converting-moles-and-mass 2024-06-04T09:29:17.69709831Z ମୋଲ୍ ଓ ବସ୍ତୁତ୍ଵର ପରିବର୍ତ୍ତନ ଆଣବିକ ବସ୍ତୁତ୍ୱ ଦିଆଯାଇଥିବା ସମୟରେ ମୋଲ୍‌କୁ ଗ୍ରାମ୍ ଓ ଗ୍ରାମ୍‌କୁ ମୋଲ୍‌ରେ ପରିଣତ କରିବା ଅଭ୍ୟାସ କର। Yuki exercise