问题 填空题

元素的化学性质主要与原子的 ______有关;地壳中含量最多的元素与地壳中含量最多的金属元素组成的化合物的化学式为 ______.

答案

最外层电子数大于4,易得电子,最外层电子数小于4,易失去电子,所以说决定元素化学性质的是最外层电子数;

地壳中含量最多的金属元素是铝,地壳中含量最多的元素是氧,它们形成的化合物的化学式可以按照下面的步骤写出:

第一步:写出元素符号,铝元素符号在左,氧元素符号在右:AlO

第二步:标注元素的化合价:铝价正三,氧负二

第三步:化合价的绝对值交叉写在元素符号的右下角:Al2O3

第四步:用化合价原则检查:(+3)×2+(-2)×3=0

因此Al2O3就是要求的化合物的化学式.

故答案为:最外层电子数; Al2O3

填空题
填空题

[A] Market Data

[B] Market Prosperity

[C] Secret of Success

[D] Questions to Ask

[E] Understanding Your Market

[F] Market Research

Successful small business expansions and new job formation lead the way in creating new markets, innovations and jobs that fuel economic growth and prosperity.

In recognition of the importance of small business to a p economy, the U. S. Small Business Administration (SBA) is pleased to help meet the information needs of existing business owners and aspiring entrepreneurs.

41. ______

Your business will not succeed just because you want it to succeed. Determining if there is a market for your products or services is the most critical item of planning. Once you decide on your product or service, you must analyze your market--a process involving interviewing competitors, suppliers and new customers.

Before you begin researching your market, however, you should take a brief, but close, look at your product or service from an objective standpoint. You should ask yourself the following questions:

-- Is this product or service in constant demand

-- How many competitors provide the same service or product

-- Can I create a demand for my product or service

-- Can I compete effectively in price, quality and delivery

—Can I price my product or service to assure a profit

Once you are satisfied that these preliminary questions are answered, move on to performing your research.

42. ______.

It is extremely beneficial to investigate a market because the information gathered can increase your profit potential. Specifically, it:

-- Indicates alternative sales approaches to your market.

-- Provides a more accurate base for making profit assumptions.

-- Aids in the organization of marketing activities.

-- Assists in the development of critical short/mid-term goals.

-- Helps establish your market’s profit boundaries.

Unfortunately, many entrepreneurs fail to complete this critical section of their business plan. Collecting research data can be frustrating unless you have defined your goals and organized the collection and analysis process. To prevent this from happening, you must plan how you will collect, sort and analyze the information. Maintain a notebook and file in which to store, organize and retrieve data as needed.

43. ______.

Your research should ask these questions..

-- Who are your customers

-- Where are they located

-- What are their needs and resources

-- Is your service or product essential in their operations pr activities

— Can the customer afford your service or product

— Where can you create a demand for your service or product

-- What areas within your market are declining or growing

-- What is the general economy of your service or product area

44. ______.

Knowing your market requires an understanding not only of your product, but also of your customers’ socioeconomic characteristics. This information will serve as a map in letting you know what is ahead.

More market information can be found in,

-- Library listings of trade associations and journals.

-- Regional planning organizations’ studies on growth trends.

-- Banks, realtors and insurance companies.

—Competitors.

-- Customer surveys in your market area.

Once you have obtained and analyzed this information, it will become the foundation of your business plan. Research information is important because it supports the basic assumptions in your financial projection--your reason for going into business.

45. ______

To be successful, a small business owner must know the market. Market research is simply an orderly, objective way of learning about people--the people who will buy from you.

44()