The most common charge associated with selenium is 2-. Indicate the chemical formulas you would expect for compounds formed between selenium and (b) lithium

검증된 단계별 안내

Identify the charge of selenium: Selenium typically forms a 2- charge, denoted as Se^{2-}.

Identify the charge of lithium: Lithium is an alkali metal and typically forms a 1+ charge, denoted as Li^{+}.

Determine the ratio of lithium ions to selenium ions needed to balance the charges: Since selenium has a 2- charge and lithium has a 1+ charge, you will need two lithium ions to balance one selenium ion.

Write the chemical formula by combining the ions in the correct ratio: The formula will be Li_2Se, indicating two lithium ions for every one selenium ion.

Verify the charge balance: Ensure that the total positive charge from lithium (2 x 1+) equals the total negative charge from selenium (1 x 2-), confirming the compound is neutral.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

41s

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Ionic Bonding

Ionic bonding occurs when atoms transfer electrons to achieve full outer electron shells, resulting in the formation of charged ions. In this case, lithium, which has a tendency to lose one electron and form a Li+ ion, will bond with selenium, which typically gains two electrons to form a Se2- ion. The resulting compound will be electrically neutral, balancing the charges of the ions.

Chemical Formula Representation

A chemical formula represents the types and numbers of atoms in a compound. For ionic compounds, the formula is derived from the ratio of the ions that balance the overall charge. In the case of lithium and selenium, the formula must reflect the 2:1 ratio of lithium ions to selenium ions to ensure charge neutrality, leading to the formula Li2Se.

Charge Balance in Compounds

Charge balance is a fundamental principle in chemistry that states that the total positive charge must equal the total negative charge in a neutral compound. For lithium (Li+) and selenium (Se2-), two lithium ions are needed to balance the charge of one selenium ion, resulting in a neutral compound. This principle is crucial for determining the correct stoichiometry in ionic compounds.