{"id":220143,"date":"2025-05-27T15:18:00","date_gmt":"2025-05-27T15:18:00","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=220143"},"modified":"2025-05-27T15:18:02","modified_gmt":"2025-05-27T15:18:02","slug":"what-is-the-charge-on-the-iron-ion-in-the-compound-fe2o3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/27\/what-is-the-charge-on-the-iron-ion-in-the-compound-fe2o3\/","title":{"rendered":"What is the charge on the iron ion in the compound Fe2O3"},"content":{"rendered":"\n

What is the charge on the iron ion in the compound Fe2O3? Multiple Choice Unequal sharing of electrons in a covalent bond results in a polar bond. True or False True True False In which state of matter are the particles close together and highly organized? Multiple Choice Solid Liquid Gas All of the choices are correct. Atoms with seven valence electrons typically form one covalent bond. True or False True False Phosphorus has 15 valence electrons. True or False True True False False Elements in group 2A form ions with a +2 charge. True or False True False Which of the following compounds is classified as covalent? Multiple Choice KCI LIBI NaBr What is the formula for the lonic compound formed when magnesium and oxygen combine? Multiple Choice Mgo MgO2 M920 Mg202 The molecule below is a polar molecule. H H H-C=C CI True or False True True False False How many lone pairs of electrons are present in the Lewis structure of ammonia, NH3? Multiple Choice o o o o<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

1. What is the charge on the iron ion in Fe\u2082O\u2083?<\/strong><\/h3>\n\n\n\n

Correct Answer: +3<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Fe\u2082O\u2083 contains 2 iron (Fe) atoms and 3 oxygen (O) atoms. Oxygen typically forms a -2 ion, so 3 oxygen atoms contribute a total charge of -6. To balance this, the 2 iron atoms must contribute +6, meaning each Fe must be +3<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

2. Unequal sharing of electrons in a covalent bond results in a polar bond.<\/strong><\/h3>\n\n\n\n

Correct Answer: True<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
A polar covalent bond<\/strong> occurs when atoms share electrons unequally due to differences in electronegativity<\/strong>. This leads to a partial positive and negative charge on each atom, creating a dipole<\/strong>. Water (H\u2082O) is a classic example.<\/p>\n\n\n\n

\n\n\n\n

3. In which state of matter are the particles close together and highly organized?<\/strong><\/h3>\n\n\n\n

Correct Answer: Solid<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
In solids, particles are tightly packed<\/strong> in a fixed, orderly<\/strong> arrangement. This contrasts with liquids (close but disordered) and gases (far apart and random).<\/p>\n\n\n\n

\n\n\n\n

4. Atoms with seven valence electrons typically form one covalent bond.<\/strong><\/h3>\n\n\n\n

Correct Answer: True<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Atoms like chlorine (Cl)<\/strong> have 7 valence electrons and need 1 more to complete the octet, hence they usually form one single covalent bond<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

5. Phosphorus has 15 valence electrons.<\/strong><\/h3>\n\n\n\n

Correct Answer: False<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Phosphorus has 15 total electrons<\/strong>, but only 5 valence electrons<\/strong> because it’s in Group 5A<\/strong> of the periodic table.<\/p>\n\n\n\n

\n\n\n\n

6. Elements in Group 2A form ions with a +2 charge.<\/strong><\/h3>\n\n\n\n

Correct Answer: True<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Group 2A elements like Mg<\/strong> and Ca<\/strong> lose their two valence electrons to achieve a full shell, forming +2 cations<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

7. Which compound is covalent?<\/strong><\/h3>\n\n\n\n

Correct Answer: None listed; all are ionic.<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
KCl, LiBr, and NaBr are formed between metals and nonmetals<\/strong>, making them ionic compounds<\/strong>, not covalent.<\/p>\n\n\n\n

\n\n\n\n

8. Formula for compound formed by magnesium and oxygen?<\/strong><\/h3>\n\n\n\n

Correct Answer: MgO<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Magnesium (Mg\u00b2\u207a) and oxygen (O\u00b2\u207b) combine in a 1:1 ratio<\/strong> to form MgO<\/strong>. Charges cancel out, making it neutral.<\/p>\n\n\n\n

\n\n\n\n

9. Is the molecule H\u2013C=C\u2013Cl polar?<\/strong><\/h3>\n\n\n\n

Correct Answer: True<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Chlorine is much more electronegative<\/strong> than hydrogen and carbon, causing an unequal electron distribution and making the molecule polar<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

10. Lone pairs in NH\u2083 (ammonia)?<\/strong><\/h3>\n\n\n\n

Correct Answer: 1<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
Ammonia has 3 bonded pairs<\/strong> (with hydrogen) and 1 lone pair<\/strong> on nitrogen, totaling 4 electron domains<\/strong> around nitrogen<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

.<\/p>\n","protected":false},"excerpt":{"rendered":"

What is the charge on the iron ion in the compound Fe2O3? Multiple Choice Unequal sharing of electrons in a covalent bond results in a polar bond. True or False True True False In which state of matter are the particles close together and highly organized? Multiple Choice Solid Liquid Gas All of the choices […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-220143","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/220143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=220143"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/220143\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=220143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=220143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=220143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}