Help please! i dont understand

Answers

Answer 1
1. Mass no.= protons+ neutrons,
Therefore, mass no. of sodium = 11 + 12 = 23

2. Total no. of electrons in a neutral sodium atom (has not reacted with anything, thus has not lost any electrons, thus is neutral) = Atomic no. = electron no. = 11

3. So as mass no. of magnesium is 24, and mass no. = protons+neutrons, and no. of protons is 12, then no. of neutrons= atomic no. - protons = 24-12= 12

4. Atomic no. = no. Of electrons= 13

5. Mass no. = protons+neutrons= 31
No. Of neutrons=16
Therefore, no. Of protons= Mass no. - neutrons= 31-16=15
Also- no. Of protons=no. Of electrons= 15 (another way to solve)

Related Questions

What purpose would the sand serve?



FIRST ONE TO ANSWER CORRECTLY GETS BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass.

Explanation:

Interesting fact...

Why are there differences between the cooling rates of sand and water? Sand cools off faster than water because sand is a solid. Water heats up slower and cools off slower than sand. Sand heats up faster and cools off faster than water.

As a variable and to count as land. As if you were at a beach, this sand would count as the sand that the sun would be beaming on. ^^

-Answer

Other Questions
Why did people follow Christianity which expression is equivalent to 0.17w + 0.77 + w? -0.77 + 1.17w -0.17w + 1.77 -1.94w -1.6w The diagram of a living room is shown below. What fraction of the living room is covered by the rug? need done ASAP Hong needs to memorize words on a vocabulary list for Spanish class. He has memorized 30 of the words, which is five-sixths of the list. How many words are on the list? For this, Galileo was arrested and threatened with torture and death, but he refused to deny what he knew to be true. "I do not believe that the same God who has endowed us with senses, reason and intellect has intended us to forgo their use," he said Please answer--> The picture below is of a ceremonial rite installing the new Pharoah in Egypt. What type of government is represented in this picture?(Picture is attached below with answer options to choose from) List 11 things you know about Islam please give good answers who ever gives the best answers gets over 30 points and brainliest no short lazy answers list! when hydrogen shares electrons with oxygen the outermost shell of the hydrogen atoms are full with how many electrons? and oxygens valence shell is full with how many electrons? because the valence shells of these atoms are full,the atoms are stable. Nutritional Foods reports merchandise inventory at the lower-of-cost-or-market. Prior to releasing its financial statements for the year ended August 31, 2019, Nutritional's preliminary income statement, before the year-end adjustments, appears as follows: NUTRITIONAL FOODSIncome Statement (Partial)Year Ended March 31, 2017Sales Revenue ........ $117,000Cost of Goods Sold ..... 45,000Gross Profit ........ $72,000Nutritional has determined that the current replacement cost of ending merchandise inventory is $17,000. Cost is $19,000. Required: a. Journalize the adjusting entry for merchandise inventory, if any is required. b. Prepare a revised partial income statement to show how Nutritional Foods should report sales, cost of goods sold, and gross profit. The following information is available for Mergenthaler Corporation for the year ended December 31, 2022: Collection of principal on long-term loan to a supplier $16,000 Acquisition of equipment for cash 10,000 Proceeds from the sale of long-term investment at book value 22,000 Issuance of common stock for cash 20,000 Depreciation expense 25,000 Redemption of bonds payable at carrying (book) value 34,000 Payment of cash dividends 6,000 Net income 30,000 Purchase of land by issuing bonds payable 40,000 In addition, the following information is available from the comparative balance sheet for Mergenthaler at the end of 2022 and 2021: 2021 2022Cash $148,000 $91,000Accounts receivable (net) 25,000 15,000Prepaid insurance 19,000 13,000Total current assets $192,000 $119,000Accounts payable $30,000 $19,000Salaries and wages payable 6,000 7,000Total current liabilities $36,000 $26,000Required:Prepare Mergenthaler's statement of cash flows for the year ended December 31, 2014, using the indirect method. How did the Roman Catholic Church bring order to Western Europe? 1.on what kinds of physical evidence do scholars base their knowledge of textiles and clothing items that were used in prehistoric periods What's the answer ? A. B. C. Or D? Which of the following words best describes President Jacksons feelings toward American Indians? A. materialistic B. sympathetic C. paternalistic D. apathetic Please select the best answer from the choices provided A B C D pair that describes which angle pairs are congruent? Select all that apply 1. The Battle of Saratoga marked a turning point in the Revolutionary War because its outcome -A. inspired the British to fight harderA. , inspired the British to fight harderB. influenced France to lend support to the AmericansB. influenced France to lend support to the AmericansC. caused Britain and France to form an allianceC. caused Britain and France to form an allianceD. caused General Cornwallis to surrenderD. , caused General Cornwallis to surrender1. The Battle of Saratoga marked a turning point in the Revolutionary War because its outcome -A. inspired the British to fight harderB. influenced France to lend support to the AmericansC. caused Britain and France to form an allianceD. caused General Cornwallis to surrender will mark brainlyest 10/19 (1) When I was little, Grandma always played with me. (2) She taught me how to dance, and she made beautiful clothes for my dolls. (3) She was my special friend, but I had no idea just how special until I was in ninth grade.(4) Since my family did not have much money, I knew I would never be able to buy a great dress for the school dance. (5) That did not stop me from dreaming, however. (6) Many nights, after I had finished my homework, I would sketch the "perfect" dress. (7) I kept all the sketches on my bedside table. (8) I guess I figured that was a good place to store impossible dreams.(9) One Monday, Mom and Grandma agreed that we should start shopping for my dress. (10) I dreaded shopping for it; I knew I would face a big disappointment when I found nothing close to my "perfect" dress. (11) Nevertheless, we decided that we would shop for my dress on Saturday.(12) That Friday night at dinner, Grandma seemed unusually cheerful as she asked, Whats cooking, Natalie? (13) When I replied, Not much, she sang out, like a happy little bird, Oh, Natalie! I have a surprise, and reached under the table to pull out a huge, flat box. (14) When I opened it, I gasped and burst into tears. (15) Grandma had made my perfect dress! (16) When I looked over, I saw that she was crying, too. (17) "I'm sorry," she said, now laughing. (18) "I was so worried it wouldn't be what you hoped for," she said. (19) "I love it," I said and gave her a hug.Which of these best describes the main conflict that Natalie faces? A. an internal conflict: her decision about whether to go to the dance B. an internal conflict: her feelings about her grandmother's gift C. an external conflict: her struggle to design a perfect dress for the dance D. an external conflict: her inability to obtain a perfect dress for the danceIn sentence 12, Grandma uses the expression, "What's cooking?" How does her use of this expression help characterize her? A. It hints at the gift she is about to give Natalie. B. It suggests that she does not respect Natalie. C. It shows that she is cheerful and informal. D. It suggests that she is helpful and full of ideas.Which statement best describes Grandma as the author presents her? A. She is practical and quite stern. B. She is helpful and generous. C. She is funny and full of jokes. D. She is thrifty and a bit argumentative.Which statement best expresses the main theme of this passage? A. Social events are very important. B. Many people care too much about their appearance. C. It is very hard to do without material goods. D. Love can help make dreams come true.The following question has two parts. Answer Part A first, and then Part B.Part AGiven the details in the passage and your own knowledge of human behavior, what inference can you make about why Grandma made Natalie's "perfect" dress? A. Grandma wanted to make Natalie's dream come true. B. Grandma always loved to make doll clothes for Natalie. C. Grandma did not want to buy Natalie a beautiful dress. D. Grandma was bored and wanted an interesting project.Part BWhat details from the passage help support the answer to Part A? A. She taught me how to dance, and she made beautiful clothes for my dolls. B. . . . after I had finished my homework, I would sketch the "perfect" dress. C. Nevertheless, we decided that we would shop for my dress on Saturday. D. "I was so worried it wouldn't be what you hoped for," she said.Please Help A scuba diver is 12 meters below sea level. If the diver descends 39 meters further, what integer represents the scuba divers new elevation relative to sea level?